Richard Jefferson vs. Len Kosmalski Season by Season Comparison

Side by side comparison of each NBA season of Len Kosmalski and Richard Jefferson, from their rookie seasons to their last year played, in chronological order with awards, stats, championships and playoff performance of their teams every year.

Player comparisons:
Career comparison / Season by season

Who had the better rookie season? Who had best stats in their 10th season? Who won a championship first? These questions and many others, are answered here.

Richard Jefferson played 17 years in the NBA, 15 more than Len Kosmalski, who played 2. Richard Jefferson had the first of his seasons in 2001-02, while Len Kosmalski had his rookie season in 1974-75. With that starting point, here you can take a look at each of their seasons side by side and compare how their careers evolved in achivements, awards and championships won, the stats they recorded both in the Regular Season and the Playoffs and how their teams performed in the postseason.

Their Careers

Player		 Total Seasons Playoffs Played NBA Years
Richard Jefferson 17 12 2001-02 to 2017-18
Len Kosmalski 2 1 1974-75 to 1975-76

Comparison Season by Season

Jump to season:
1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17

Rookie Season
Richard Jefferson Len Kosmalski
Season 2001-021974-75
Team New Jersey NetsKansas City-Omaha Kings
Honors & Awards Achievement All-Rookie Second Team-
Playoffs Nets Lost NBA FinalsKings Lost West Conf Semis
more >>
Regular Season Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson 79 24.3 9.4 1.1 2.6 3.7 1.8 0.8 0.6 1.4 2.7 3.4 7.5 .457 0.2 0.7 .232 2.4 3.4 .713
Len Kosmalski 67 6.2 1.3 0.5 1.3 1.8 0.6 0.1 0.1 - 1.0 0.5 1.2 .398 - - - 0.4 0.4 .828
Playoffs Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson 20 22.1 7.0 0.8 3.8 4.6 1.3 0.6 0.5 1.3 2.0 2.7 5.7 .465 0.0 0.1 .000 1.7 3.0 .550
Len Kosmalski 6 4.8 1.0 0.2 1.5 1.7 0.8 0.2 0.0 - 0.7 0.3 0.5 .667 - - - 0.3 0.5 .667

Season 2
Richard Jefferson Len Kosmalski
Season 2002-031975-76
Team New Jersey NetsKansas City Kings
Honors & Awards
Playoffs Nets Lost NBA FinalsDid Not Play
more >>
Regular Season Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson 80 36.0 15.5 1.9 4.6 6.4 2.5 1.0 0.6 2.0 2.7 5.7 11.4 .501 0.1 0.3 .250 4.1 5.5 .743
Len Kosmalski 9 10.3 2.2 1.0 1.8 2.8 1.3 0.3 0.4 - 1.2 0.9 2.2 .400 - - - 0.4 0.8 .571
Playoffs Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson 20 35.7 14.1 1.5 4.9 6.4 2.4 0.8 0.2 2.3 3.4 5.5 11.6 .476 0.0 0.2 .000 3.1 4.3 .718
Len Kosmalski ------- --- ----------

Season 3
Richard Jefferson Len Kosmalski
Season 2003-04-
Team New Jersey Nets-
Honors & Awards
Playoffs Nets Lost East Conf Semis-
more >>
Regular Season Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson 82 38.2 18.5 1.3 4.3 5.7 3.8 1.1 0.3 2.4 2.7 6.8 13.6 .498 0.6 1.6 .364 4.4 5.7 .763
Len Kosmalski ------- --- ----------
Playoffs Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson 11 41.6 19.8 1.3 5.0 6.3 3.8 1.3 0.7 3.9 3.2 6.0 14.4 .418 0.8 3.0 .273 7.0 9.8 .713
Len Kosmalski ------- --- ----------

Season 4
Richard Jefferson Len Kosmalski
Season 2004-05-
Team New Jersey Nets-
Honors & Awards
Playoffs Nets Lost East Conf 1st Rd-
more >>
Regular Season Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson 33 41.1 22.2 1.5 5.8 7.3 4.0 1.0 0.5 4.0 3.3 7.2 17.1 .422 0.9 2.7 .337 6.9 8.2 .844
Len Kosmalski ------- --- ----------
Playoffs Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson 4 35.5 15.8 2.0 3.5 5.5 2.3 0.8 0.0 2.0 3.5 5.0 12.5 .400 0.5 2.5 .200 5.3 7.8 .677
Len Kosmalski ------- --- ----------

Season 5
Richard Jefferson Len Kosmalski
Season 2005-06-
Team New Jersey Nets-
Honors & Awards
Playoffs Nets Lost East Conf Semis-
more >>
Regular Season Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson 78 39.2 19.5 1.2 5.6 6.8 3.8 0.8 0.2 2.2 2.5 6.3 12.9 .493 0.8 2.4 .319 6.0 7.4 .812
Len Kosmalski ------- --- ----------
Playoffs Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson 11 39.7 22.2 0.6 3.5 4.1 4.1 0.9 0.4 2.7 2.9 8.2 15.0 .545 1.1 2.6 .414 4.7 5.7 .825
Len Kosmalski ------- --- ----------

Season 6
Richard Jefferson Len Kosmalski
Season 2006-07-
Team New Jersey Nets-
Honors & Awards
Playoffs Nets Lost East Conf Semis-
more >>
Regular Season Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson 55 35.6 16.3 0.9 3.5 4.4 2.7 0.6 0.1 2.2 2.2 5.5 12.1 .456 0.9 2.6 .359 4.3 5.9 .733
Len Kosmalski ------- --- ----------
Playoffs Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson 12 40.8 19.7 0.3 5.3 5.6 2.3 0.8 0.4 2.3 2.0 6.8 14.0 .482 1.1 3.3 .325 5.1 5.5 .924
Len Kosmalski ------- --- ----------

Season 7
Richard Jefferson Len Kosmalski
Season 2007-08-
Team New Jersey Nets-
Honors & Awards
Playoffs Did Not Play-
more >>
Regular Season Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson 82 39.0 22.6 1.1 3.0 4.2 3.1 0.9 0.3 2.4 2.7 7.5 16.2 .466 0.9 2.6 .362 6.6 8.3 .798
Len Kosmalski ------- --- ----------
Playoffs Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson ------- --- ----------
Len Kosmalski ------- --- ----------

Season 8
Richard Jefferson Len Kosmalski
Season 2008-09-
Team Milwaukee Bucks-
Honors & Awards
Playoffs Did Not Play-
more >>
Regular Season Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson 82 35.8 19.6 0.7 3.9 4.6 2.4 0.8 0.2 2.0 3.1 6.5 14.9 .439 1.4 3.6 .397 5.1 6.3 .805
Len Kosmalski ------- --- ----------
Playoffs Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson ------- --- ----------
Len Kosmalski ------- --- ----------

Season 9
Richard Jefferson Len Kosmalski
Season 2009-10-
Team San Antonio Spurs-
Honors & Awards
Playoffs Spurs Lost West Conf Semis-
more >>
Regular Season Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson 81 31.1 12.3 0.7 3.7 4.4 2.0 0.6 0.5 1.3 2.2 4.5 9.6 .467 0.7 2.3 .316 2.6 3.5 .735
Len Kosmalski ------- --- ----------
Playoffs Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson 10 33.4 9.4 0.8 4.5 5.3 1.8 0.6 0.6 1.5 2.0 3.4 7.0 .486 0.1 0.5 .200 2.5 3.3 .758
Len Kosmalski ------- --- ----------

Season 10
Richard Jefferson Len Kosmalski
Season 2010-11-
Team San Antonio Spurs-
Honors & Awards
Playoffs Spurs Lost West Conf 1st Rd-
more >>
Regular Season Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson 81 30.4 11.0 0.7 3.2 3.8 1.3 0.5 0.4 1.1 2.0 3.8 7.9 .474 1.7 3.8 .440 1.8 2.4 .759
Len Kosmalski ------- --- ----------
Playoffs Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson 6 29.3 6.5 0.3 3.8 4.2 0.8 0.5 0.5 1.0 2.2 2.0 5.2 .387 1.0 2.8 .353 1.5 1.8 .818
Len Kosmalski ------- --- ----------

Season 11
Richard Jefferson Len Kosmalski
Season 2011-12-
Team San Antonio Spurs, Golden State Warriors-
Honors & Awards
Playoffs Did Not Play-
more >>
Regular Season Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson 63 27.7 9.2 0.4 3.1 3.5 1.4 0.6 0.3 0.8 1.9 3.2 7.7 .416 1.8 4.3 .420 0.9 1.3 .694
Len Kosmalski ------- --- ----------
Playoffs Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson ------- --- ----------
Len Kosmalski ------- --- ----------

Season 12
Richard Jefferson Len Kosmalski
Season 2012-13-
Team Golden State Warriors-
Honors & Awards
Playoffs Warriors Lost West Conf Semis-
more >>
Regular Season Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson 56 10.1 3.1 0.1 1.4 1.5 0.6 0.3 0.1 0.4 0.8 1.1 2.4 .456 0.3 0.8 .311 0.7 0.9 .717
Len Kosmalski ------- --- ----------
Playoffs Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson 7 5.6 1.9 0.3 0.7 1.0 0.1 0.1 0.1 0.0 0.7 0.6 1.3 .444 0.3 0.4 .667 0.4 1.3 .333
Len Kosmalski ------- --- ----------

Season 13
Richard Jefferson Len Kosmalski
Season 2013-14-
Team Utah Jazz-
Honors & Awards
Playoffs Did Not Play-
more >>
Regular Season Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson 82 27.0 10.1 0.2 2.5 2.7 1.6 0.7 0.2 1.1 2.0 3.6 8.0 .450 1.5 3.7 .409 1.5 2.0 .741
Len Kosmalski ------- --- ----------
Playoffs Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson ------- --- ----------
Len Kosmalski ------- --- ----------

Season 14
Richard Jefferson Len Kosmalski
Season 2014-15-
Team Dallas Mavericks-
Honors & Awards
Playoffs Mavericks Lost West Conf 1st Rd-
more >>
Regular Season Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson 74 16.8 5.8 0.3 2.1 2.5 0.8 0.4 0.1 0.7 1.6 1.9 4.4 .444 0.9 2.1 .426 1.1 1.5 .684
Len Kosmalski ------- --- ----------
Playoffs Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson 4 12.8 3.8 0.0 0.5 0.5 0.3 0.5 0.0 0.8 2.3 1.3 3.5 .357 0.8 2.0 .375 0.5 0.5 1.000
Len Kosmalski ------- --- ----------

Season 15
Richard Jefferson Len Kosmalski
Season 2015-16-
Team Cleveland Cavaliers-
Honors & Awards
Playoffs NBA Champion NBA Champion-
more >>
Regular Season Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson 74 17.9 5.5 0.2 1.5 1.7 0.8 0.4 0.2 0.6 1.7 1.9 4.2 .458 0.9 2.3 .382 0.8 1.2 .667
Len Kosmalski ------- --- ----------
Playoffs Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson 21 18.1 5.4 0.8 2.8 3.5 0.7 0.5 0.0 0.6 1.6 2.1 4.0 .524 0.5 1.3 .393 0.7 1.0 .750
Len Kosmalski ------- --- ----------

Season 16
Richard Jefferson Len Kosmalski
Season 2016-17-
Team Cleveland Cavaliers-
Honors & Awards
Playoffs Cavaliers Lost NBA Finals-
more >>
Regular Season Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson 79 20.4 5.7 0.4 2.2 2.6 1.0 0.3 0.1 0.7 1.9 1.9 4.3 .446 0.8 2.4 .333 1.0 1.4 .741
Len Kosmalski ------- --- ----------
Playoffs Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson 14 12.8 3.9 0.7 1.1 1.8 0.5 0.1 0.2 0.6 2.1 1.1 2.7 .421 0.4 1.4 .263 1.3 2.0 .643
Len Kosmalski ------- --- ----------

Season 17
Richard Jefferson Len Kosmalski
Season 2017-18-
Team Denver Nuggets-
Honors & Awards
Playoffs Did Not Play-
more >>
Regular Season Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson 20 8.2 1.5 0.1 0.8 0.9 0.8 0.1 0.1 0.3 0.6 0.6 1.4 .444 0.1 0.4 .286 0.2 0.4 .571
Len Kosmalski ------- --- ----------
Playoffs Stats
G Min Pts ORb DRb Reb Ast Stl Blk TO PF FGM / A % 3PM / A % FTM / A %
Richard Jefferson ------- --- ----------
Len Kosmalski ------- --- ----------
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