| 1990 MLB Leaders | ||
| 1990 American League Standings | |||||||||
| EAST | W | L | PCT | GB | HOME | ROAD | RS | RA | DIFF |
| x-Boston | 88 | 74 | .543 | -- | -- | -- | 699 | 664 | +35 |
| Toronto | 86 | 76 | .531 | 2 | -- | -- | 767 | 661 | +106 |
| Detroit | 79 | 83 | .488 | 9 | -- | -- | 750 | 754 | -4 |
| Cleveland | 77 | 85 | .475 | 11 | -- | -- | 732 | 737 | -5 |
| Baltimore | 76 | 85 | .472 | 11.5 | -- | -- | 669 | 698 | -29 |
| Milwaukee | 74 | 88 | .457 | 14 | -- | -- | 732 | 760 | -28 |
| New York | 67 | 95 | .414 | 21 | -- | -- | 603 | 749 | -146 |
| WEST | W | L | PCT | GB | HOME | ROAD | RS | RA | DIFF |
| *-Oakland | 103 | 59 | .636 | -- | -- | -- | 733 | 570 | +163 |
| Chicago | 94 | 68 | .580 | 9 | -- | -- | 682 | 633 | +49 |
| Texas | 83 | 79 | .512 | 20 | -- | -- | 676 | 696 | -20 |
| California | 80 | 82 | .494 | 23 | -- | -- | 690 | 706 | -16 |
| Seattle | 77 | 85 | .475 | 26 | -- | -- | 640 | 680 | -40 |
| Kansas City | 75 | 86 | .466 | 27.5 | -- | -- | 707 | 709 | -2 |
| Minnesota | 74 | 88 | .457 | 29 | -- | -- | 666 | 729 | -63 |
| 1990 National League Standings | |||||||||
| EAST | W | L | PCT | GB | HOME | ROAD | RS | RA | DIFF |
| *-Pittsburgh | 95 | 67 | .586 | -- | -- | -- | 733 | 619 | +114 |
| New York | 91 | 71 | .562 | 4 | -- | -- | 775 | 613 | +162 |
| Montreal | 85 | 77 | .525 | 10 | -- | -- | 662 | 598 | +64 |
| Philadelphia | 77 | 85 | .475 | 18 | -- | -- | 646 | 729 | -83 |
| Chicago | 77 | 85 | .475 | 18 | -- | -- | 690 | 774 | -84 |
| St. Louis | 70 | 92 | .432 | 25 | -- | -- | 599 | 698 | -99 |
| WEST | W | L | PCT | GB | HOME | ROAD | RS | RA | DIFF |
| x-Cincinnati | 91 | 71 | .562 | -- | -- | -- | 693 | 597 | +96 |
| Los Angeles | 86 | 76 | .531 | 5 | -- | -- | 728 | 685 | +43 |
| San Francisco | 85 | 77 | .525 | 6 | -- | -- | 719 | 710 | +9 |
| San Diego | 75 | 87 | .463 | 16 | -- | -- | 673 | 673 | 0 |
| Houston | 75 | 87 | .463 | 16 | -- | -- | 573 | 656 | -83 |
| Atlanta | 65 | 97 | .401 | 26 | -- | -- | 682 | 821 | -139 |
| 1990 All-Star Results | |||||||||
| DATE | SCORE | VENUE | LOCATION | ATT | WP | LP | MVP | ||
| July 10, 1990 | AL 2, NL 0 | Wrigley Field | Chicago, IL | 39,071 | Bret Saberhagen | Jeff Brantley | Julio Franco | ||
| Rosters | Complete Results | |||||||||
| 1990 Postseason Results | ||
| ROUND | OUTCOME | RESULT |
| World Series | Cincinnati Reds defeated Oakland Athletics | 4-0 |
| League Championship Series | Oakland Athletics defeated Boston Red Sox | 4-0 |
| League Championship Series | Cincinnati Reds defeated Pittsburgh Pirates | 4-2 |
| Complete Results | ||
| 1990 Award Winners | ||
| PLAYER | TEAM | AWARD |
| No award winners. | ||
| Complete Results | ||
| 1990 Draft Picks | |||
| PLAYER | POS | TEAM | |
| 1 | Chipper Jones | SS | Atlanta Braves |
| 2 | Tony Clark | OF | Detroit Tigers |
| 3 | Mike Lieberthal | C | Philadelphia Phillies |
| 4 | Alex Fernandez | RHP | Chicago White Sox |
| 5 | Kurt Miller | RHP | Pittsburgh Pirates |
| Complete Results | |||
| 1990 No-Hitters | ||||||
| DATE | PITCHER | TEAM | OPPONENT | SCORE | LEAGUE | NOTES |
| 9/2/1990 | Dave Stieb | TOR | CLE | 3-0 | AL | |
| 8/15/1990 | Terry Mulholland | PHI | SFO | 6-0 | NL | |
| 6/29/1990 | Fernando Valenzuela | LA | STL | 6-0 | NL | |
| 6/29/1990 | Dave Stewart | OAK | TOR | 5-0 | AL | |
| 6/11/1990 | Nolan Ryan | TEX | OAK | 5-0 | AL | |
| 6/2/1990 | Randy Johnson | SEA | DET | 2-0 | AL | |
| 4/11/1990 | Mike Witt (2) | CAL | SEA | 1-0 | AL | Combined |
| 4/11/1990 | Mark Langston (7) | CAL | SEA | 1-0 | AL | Combined |
| Complete Results | ||||||