10 Cent Beer Night in Cleveland - 1974
After the Rangers took an early lead, the alcohol-fueled frenzy that had pushed fans through the turnstiles began to push them onto the field. In the second inning, a large woman jumped into the Indians' on-deck circle and lifted her shirt; in the fourth, a naked man slid into second as Rangers outfielder Tom Grieve circled the bases with his second homer of the game; and in the fifth, a father-and-son team welcomed Hargrove to Cleveland by leaping into the infield and mooning the crowd. From the seventh inning onwards, a steady stream of interlopers greeted Burroughs in right field. Some even stopped to shake his hand.
Things got ugly in the 9th inning when the Indians tied the game and put the winning run on third, that's when fans stole the hat and glove of Texas right fielder and that year's eventual AL MVP Jeff Burroughs. When he retrieved his hat and glove fans started throwing beer, rocks, seats, parts of seats, golf balls and reports noted that many fans were armed with knives. Texas manager Billy Martin told his players to grab bats and go out to save the Texas outfielders, Cleveland manager Ken Aspromonte ordered his players to do the same. All hell had broken out and the umpire crew forfeited the game in favor of the Rangers.
Here is the Wikipedia account of the game.
Former Cub and then future Hall of Famer Fergie Jenkins started the game for Texas.