With runners on second and third, Morrisey stroked Jeremy Hill's (0-1) pitch into right field, scoring Mike Edwards.
After managing just a pair of hits through the first six innings, Oakland scored four times in the final three innings. Luis Lopez started the rally with a two-run double in the sixth and Eric Byrnes' base hit in the seventh forged a 3-3 tie.
Tim Hudson started and allowed two runs and three hits over four innings for Oakland. Keith Foulke worked a scoreless inning and Mark Mulder surrendered one run and four hits in four innings for the win.
Kansas City started Runelvys Hernandez, who allowed one hit over three scoreless innings.
Mendy Lopez had a pair of doubles for the Royals and his two-base hit staked them to a 3-0 advantage in the seventh.