Pena went 1-for-4 with a solo home run in Sunday's 2-1 win over the Mariners.
Pena went deep off Mariners starter Marco Gonzales in the second inning. That was Pena's fourth homer in May and his eighth long ball of the year. The shortstop has been steady with a .290/.340/.510 slash line, 23 RBI, 22 runs scored, three stolen bases, six doubles and a triple through 159 plate appearances in his first big-league season.