Campbell, back in the majors for the first time since 2016, went 3-for-11 with a run scored over four games with the big club. He'll try to stay ready for his next opportunity.

It's the first time back in the big leagues for the 34-year-old since he appeared in 40 games with the Mets during the 2016 season. He was off to a terrific start at Triple-A Tacoma, hitting .353/.389/.412 in his first 19 plate appearances.

Campbell, 34, was part of the Athletics' player pool last season but didn't see any time in the majors. In fact, he hasn't played in the big leagues since 2016.

Campbell will report to Oakland, taking the roster spot of Jorge Mateo, who was traded to the Padres. The other five players will report to the A's alternate site. Puason is 17 and has yet to play an inning of pro ball, but he's considered one of the club's top prospects.