That home run gave the Padres a 2-1 lead, one that would eventually dissolve into a 4-2 loss to the Rays in front a crowd of 17,396 that included many moms in the stands on Mother's Day.
Sunday marked the eighth straight Mother's Day when members of the Padres and the rest of Major League Baseball wore pink equipment and took to the plate with pink bats.
The pink is about honoring mothers, but it is also part of MLB's effort to raise breast cancer awareness.
Amarista was not the only member of the Padres to have success with a pink bat.
Teammate Yonder Alonso singled in Chase Headley in the fourth inning while swinging pink. Earlier in that inning, Carlos Quentin singled sharply to center field with a pink bat.
Corey Brock is a reporter for MLB.com. Keep track of @FollowThePadres on Twitter. This story was not subject to the approval of Major League Baseball or its clubs.