Here's the all-time list as of the start of the 2008 season:
CAREER
AT BATS >= 500
AVERAGE AVG AB
1 Lance Johnson .326 947
2 John Olerud .315 1662
3 David Wright .311 2024
4 Tommy Davis .302 577
5 Endy Chavez .300 503
6 Rickey Henderson .298 534
7 Keith Hernandez .297 3164
8 Paul Lo Duca .297 957
9 Mike Piazza .296 3478
10 Dave Magadan .292 2088
11 Edgardo Alfonzo .292 3897
12 Rico Brogna .291 814
13 Steve Henderson .287 1800
14 Shawn Green .284 559
15 Jose Reyes .284 2518
16 Mackey Sasser .283 944
17 Wally Backman .283 2369
18 Benny Agbayani .282 937
19 Ron Hunt .282 1683
20 Jose Vizcaino .282 1282
21 Cleon Jones .281 4223
22 Roger Cedeno .279 1448
23 Jeff Kent .279 1831
24 Lenny Dykstra .278 1686
25 Jay Payton .278 1154
26 Felix Millan .278 2677
27 Joe Orsulak .276 991
28 Mookie Wilson .276 4027
29 Rusty Staub .276 2571
30 Gregg Jefferies .276 1713
31 Timo Perez .276 1078
32 Eddie Murray .274 1161
33 Joel Youngblood .274 1897
34 Bernard Gilkey .273 1353
35 Alex Ochoa .273 557
36 Carlos Beltran .272 1646
37 Kevin McReynolds .272 2910
38 Mark Carreon .272 596
39 Lenny Randle .272 950
40 Del Unser .271 807
41 Jesse Gonder .271 572
42 Ray Knight .271 850
43 Vince Coleman .270 880
44 Bobby Bonilla .270 1779
45 Ty Wigginton .270 1001
46 Cliff Floyd .268 1643
47 Joe Torre .267 722
48 Donn Clendenon .267 861
49 Carlos Baerga .267 1061
50 Hubie Brooks .267 2400
51 Art Shamsky .266 1186
52 Bob Bailor .266 797
53 Daryl Boston .266 910
54 Derek Bell .266 546
55 Joe Christopher .265 1400
56 Roberto Alomar .265 853
57 Todd Pratt .265 555
58 Butch Huskey .264 1385
59 Keith Miller .264 772
60 Lee Mazzilli .264 3013
61 Frank Taveras .263 1480
62 Bruce Boisclair .263 917
63 Darryl Strawberry .263 3903
64 Danny Heep .263 918
65 Mike Vail .262 584
66 Alex Trevino .262 733
67 Jose Valentin .262 550
68 Frank Thomas .262 1188
69 Carlos Delgado .262 1062
70 Jason Phillips .262 791
71 Tommie Agee .262 2416
72 Ellis Valentine .261 506
73 Ed Kranepool .261 5436
74 Robin Ventura .260 1513
75 John Stearns .259 2679
76 Todd Zeile .259 1423
77 Ken Boyer .258 662
78 Tim Teufel .256 1279
79 Jerry Grote .256 3881
80 Kaz Matsui .256 857
81 Elliott Maddox .255 1024
82 Matt Franco .254 621
83 Vance Wilson .254 649
84 George Foster .252 2389
85 Howard Johnson .251 3968
86 Tsuyoshi Shinjo .251 514
87 Mike Phillips .250 731
T88 Luis Lopez .250 548
T88 Carl Everett .250 924
90 Ken Boswell .250 2116
91 Brian McRae .249 995
92 Mo Vaughn .249 566
93 Gary Carter .249 2176
94 Ed Charles .249 861
95 Charlie Neal .248 761
96 Rafael Santana .248 1514
97 Willie Montanez .247 1019
98 Mike Cameron .247 801
99 John Milner .245 2389
100 Rey Ordonez .245 2937
101 Tim Foli .243 719
102 Joe McEwing .243 1048
103 Dave Marshall .243 559
104 Chuck Hiller .242 594
105 Ron Swoboda .242 2212
106 Charley Smith .242 942
107 Rod Kanehl .241 796
108 Jim Hickman .241 1824
109 Barry Lyons .240 545
110 Todd Hundley .240 2549
111 Ron Hodges .240 1426
112 Ryan Thompson .239 997
113 Jeromy Burnitz .237 1119
114 Wayne Garrett .237 2817
115 Don Hahn .236 800
116 Chris Cannizzaro .236 581
117 Ted Martinez .235 1068
118 Bud Harrelson .234 4390
119 Doug Flynn .234 2137
120 Mike Jorgensen .234 800
121 Brian Giles .233 545
122 Ron Gardenhire .232 710
123 Roy McMillan .226 1127
124 Johnny Lewis .226 677
125 Kevin Elster .224 1584
126 Dave Kingman .219 2323
127 Duffy Dyer .219 1050
128 Jerry Buchek .219 603
129 Jose Oquendo .217 517
130 Charlie O'Brien .212 580
131 Dwight Gooden .197 730
132 Al Weis .191 653
133 Tom Seaver .150 975
134 Ron Darling .145 519
135 Jerry Koosman .121 807
Dave Magadan hit for .525 in 1983
Ted Williams had a career batting average of .344, 521 home runs and 1,839 RBIs
yes, at the catholic university of America. i believe he still holds the record for career batting average there
As a pitcher Babe Ruth had a career record of 94 wins 46 losses with a 2.28 ERA. As a hitter he had a career batting average of .342 with 714 home runs, and 2,217 RBIs.
John Olerud (1B) had a batting average of .354 in 1998 which is the current record. John Olerud also holds the record of best career Met batting average with a .315.
Babe Ruth as a pitcher had a career record of 94 wins 46 losses with a 2.28 ERA. As a hitter Babe Ruth had a career batting average of .342 714 home runs, and 2,217 RBIs.
Pete Rose has the all-time Major League Baseball (MLB) record for most at-bats (AB) with 14,053 at-bats in his 24-year MLB career - 1689 more than Henry "Hank" Aaron, who is #2 on the all-time career at-bats list.The active MLB player with the most career at-bats is Derek Jeter of the New York Yankees with 10,025 career at-bats.
If you mean in a career, nobody has remotely approached it. His .366 LIFETIME batting average has been bested for ONE YEAR in either league only twelve times in the last fifty years. Cobb never held the record for highest batting average in a season. It was set by Hugh Duffy at .440 in 1894, and it is inconceivable to me that it will ever be broken.
Hugh Duffy of Boston in 1894 with a Batting average of .440.
John Olerud holds the record for highest batting average by a New York Met in a single season with .354 in 1998
As of the start of the 2009 season, the active MLB player with the highest batting average is Albert Pujols of the St. Louis Cardinals at .334. Ichiro Suzuki of the Mariners is second at .331 and Todd Helton of the Rockies is third at .328.The highest all time career MLB batting average is Ty Cobb at .366.Now its Derek jeter in 2009 with .400
Clemente hit .357 for the Pittsburgh Pirates in 1967, his highest batting average in any one season during his career. Incidently, the Pirates finished 6th in the 10 team National League that season with an 81-81 record.