SAN DIEGO (AP) Rookie Jose Marmolejos had a pretty good day for a guy who didn’t know he was on the roster until three hours before the first pitch of Thursday’s doubleheader.

Marmolejos hit his first grand slam and Shed Long Jr. also connected in the six-run first inning that carried the Seattle Mariners to an 8-3 victory against the San Diego Padres and a doubleheader split.

Marmolejos also had a big defensive play at first base and had two home runs on the day.

”When we needed a big hit, Marmo got us going with a grand slam in the first inning,” manager Scott Servais said. ”It was great to see from a guy who, when he woke up this morning, had no idea he’d be on the active roster and he ended up hitting two home runs for us.”

The Mariners took two of three from the Padres, who got