It didn't take long for Seattle Mariners first baseman Tyler Locklear to become a difference-maker for his team. Making his MLB debut against the Kansas City Royals on Sunday, the 23-year-old call-up smacked a go-ahead double in the seventh inning for his first career hit. The knock proved pivotal, as the Mariners went on to win a 6-5 thriller in 10 innings. "I thought [the go-ahead double] was going to hang up a little bit," Locklear said. "I was just glad it got down."