Since 2000, Charles Howell III has the most rounds, with 2,068 rounds.

	NAME	ROUNDS	EVENTS	TOP 10	WINS	MONEY
1	Charles Howell III C. Howell III	2,068	1465	98	3	$40,241,292
2	Stewart Cink S. Cink	2,034	1438	85	7	$40,839,875
3	Brian Gay B. Gay	1,991	1552	52	5	$24,167,690
4	Matt Kuchar M. Kuchar	1,906	1112	118	9	$59,949,518
5	Rory Sabbatini R. Sabbatini	1,845	1314	78	6	$35,737,720
6	Lucas Glover L. Glover	1,794	1037	66	6	$40,504,876
7	J.J. Henry	1,766	1385	40	3	$16,918,486
8	Zach Johnson Z. Johnson	1,765	1106	84	12	$49,836,073
9	Charley Hoffman C. Hoffman	1,675	979	63	4	$35,956,819
10	Phil Mickelson P. Mickelson	1,669	1238	149	32	$86,111,003
11	Ryan Palmer R. Palmer	1,664	1067	71	4	$33,728,390
12	Jim Furyk J. Furyk	1,638	1227	146	13	$64,494,929
13	Vijay Singh V. Singh	1,626	1369	135	26	$62,771,426
14	Pat Perez P. Perez	1,625	1146	64	3	$28,830,158
15	Jerry Kelly J. Kelly	1,620	1393	80	3	$27,662,126
16	K.J. Choi	1,609	1266	68	8	$32,803,597
17	Aaron Baddeley A. Baddeley	1,603	1069	52	4	$24,019,468
18	Chad Campbell C. Campbell	1,596	1239	57	4	$26,542,793
19	John Senden J. Senden	1,583	1242	43	2	$21,654,649
20	Nick Watney N. Watney	1,566	1006	56	5	$30,351,717
21	Bill Haas B. Haas	1,537	913	57	6	$30,643,582
22	Kevin Streelman K. Streelman	1,493	801	53	2	$27,382,702
23	Justin Rose J. Rose	1,489	858	114	11	$68,272,216
24	Jonathan Byrd J. Byrd	1,487	1137	46	5	$20,397,699
25	Kevin Na K. Na	1,458	936	79	5	$37,819,638

StatMuse has season-level data for rounds going back to the 1980 season.