Leo Rivas hit a walkoff homer in the bottom of the 13th as the Mariners outlasted the Cardinals 4-2 on Wednesday.

The Cardinals failed to score in their half of the 13th, so they though Rivas might simply try to bunt the automatic runner over to start the bottom of the inning. Instead, he yanked the first pitch 361 feet down the right field line. It was Rivas’s first at-bat of the night after he previously pinch-ran for Jorge Polanco and his second big-league homer in 175 plate appearances since debuting last year. He’s been a very nice surprise in hitting .288/.416/.397, but it hasn’t made him a lineup fixture, as he’s started just one of the Mariners’ last four games.