The Boston Red Sox optioned outfielders Jackie Bradley Jr. and Rusney Castillo to Triple-A Pawtucket on Thursday before an exhibition game against the Minnesota Twins.

The Red Sox also assigned right-hander Dalier Hinojosa, shortstop Deven Marrero and catcher Matt Spring to their minor league camp.

Bradley opened the 2014 season as Boston’s starting center fielder, but the Red Sox are set in the outfield this year with Hanley Ramirez in left, Mookie Betts in center, Shane Victorino in right and backups Allen Craig and Daniel Nava.

In 127 games as a rookie last year, Bradley batted just .198 with one home run and 30 RBIs.

Castillo, a top Cuban prospect, signed a $72.5 million contract with the Red Sox during the offseason and could be recalled from the minors relatively quickly.

The moves left the Red Sox with 38 players in big league camp, including 30 who are active on the 40-man roster.

In Thursday night’s exhibition game, Mike Napoli slammed a two-run home run to help the Red Sox beat the Twins 8-5.

Dustin Pedroia and David Ortiz each chipped in with a double for the Red Sox, with Pedroia driving in two runs and Ortiz plating one. Pablo Sandoval contributed two hits and an RBI while Mookie Betts added a single and an RBI.

Right-handed starter Rick Porcello turned in a solid effort in his final spring training game as he gave up a run and five hits over four innings. He struck out three and didn’t walk a batter.

Surgery set for Vazquez

The Boston Red Sox announced that catcher Christian Vazquez will undergo season-ending Tommy John surgery on Thursday.

Vazquez felt discomfort in his right elbow after a March 13 game. He caught in a minor league game on Friday but was instructed to throw only back to the pitcher.

An MRI indicated concern about the elbow and Vazquez visited Dr. James Andrews on Wednesday for a second opinion.

The recovery time for non-pitchers from elbow ligament replacement surgery is usually nine months, which would allow Vazquez to return for the 2016 season.

Veteran Ryan Hanigan will move into the starting role behind the plate. The Red Sox also have catcher Sandy Leon, who was acquired from the Washington Nationals during the offseason. Behind Hanigan and Leon is top prospect Blake Swihart.

Last season as a rookie, Vazquez batted .240 with one home run in 55 games for the Red Sox.