Davis Love III has the most career rounds, with 2,739 rounds.

	NAME	ROUNDS	WINS	EVENTS	TOP 10	MONEY
1	Davis Love III D. Love III	2,739	21	2418	180	$44,959,243
2	Mark Calcavecchia M. Calcavecchia	2,606	13	2355	142	$24,214,778
3	Jay Haas J. Haas	2,510	8	2402	130	$14,241,577
4	Mark Brooks M. Brooks	2,493	7	2307	58	$9,455,442
5	Billy Mayfair B. Mayfair	2,475	5	2396	73	$20,303,642
6	Jeff Sluman J. Sluman	2,466	6	2326	105	$18,165,266
7	John Cook J. Cook	2,418	11	2228	98	$12,685,199
8	Stewart Cink S. Cink	2,394	8	1738	105	$43,905,339
9	Scott Hoch S. Hoch	2,344	11	2132	163	$18,530,158
10	Fred Couples F. Couples	2,330	15	2087	162	$22,860,333
11	Brad Faxon B. Faxon	2,324	8	2170	88	$17,769,250
12	Joey Sindelar J. Sindelar	2,311	7	2246	83	$11,196,462
13	Bob Tway B. Tway	2,299	8	2156	103	$15,785,814
14	Mark O'Meara M. O'Meara	2,282	16	2132	119	$14,325,370
15	Phil Mickelson P. Mickelson	2,273	45	1779	198	$94,798,661
16	Corey Pavin C. Pavin	2,269	15	2172	108	$16,021,370
17	Jim Furyk J. Furyk	2,250	17	1827	188	$71,507,269
18	Vijay Singh V. Singh	2,224	34	1892	185	$71,281,216
19	Kenny Perry K. Perry	2,216	14	2073	104	$32,123,129
20	Fred Funk F. Funk	2,214	8	1998	93	$21,310,436
21	Dan Forsman D. Forsman	2,178	5	1993	64	$8,687,983
22	Bob Estes B. Estes	2,172	4	2042	91	$21,628,538
23	Loren Roberts L. Roberts	2,155	8	2039	94	$15,154,767
24	Hal Sutton H. Sutton	2,154	14	2057	124	$15,267,686
25	Scott Verplank S. Verplank	2,116	5	1841	93	$27,500,226

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