Baxter, 28, played 194 major-league games, all with the Mets, over parts of the last four seasons. He’s got a career .229/.335/.348 slash line in the majors. A left-handed batter and right-handed thrower, Baxter played 59 games at Triple-A last season, batting .289/.380/.519.
Castellanos wasn’t included on the Dodgers’ playoff roster and wasn’t traveling with the team. Originally acquired from St. Louis in the Rafael Furcal trade, Castellanos batted .257/.347/.468 at Triple-A Albuquerque this year. He saw action in 24 games with the Dodgers the last two years, hitting two home runs and batting .171/.186/.390 overall.