• When rosters expand Monday before Boston's series finale against the Rays, the Red Sox will likely only add one pitcher for bullpen depth, Farrell said Sunday.
Farrell said the team will add a few more players after it arrives in New York on Tuesday for a series against the Yankees, but because of Monday's day game and a quick turnaround to New York, a single arm will be the only immediate addition.
• The Red Sox will limit the usage of relief tandem Junichi Tazawa and Koji Uehara in September, Farrell said.
"We've met. They're understanding of the usage and how frequent it might be," the Boston skipper said. "The game is going to dictate when their usage is. And yet, we also want to be careful and make sure there's appropriate rest."
Farrell said that in save situations on days when closer Uehara might be unavailable, Edward Mujica would likely close games.
• Recent acquisition Rusney Castillo made his Minor League debut in Fort Myers, Fla., on Sunday in the Gulf Coast League finals. The 27-year-old Cuban outfielder, who started at designated hitter and batted leadoff, singled through the left side in his first at-bat and finished 1-for-2.
Castillo will play five innings in center field on Monday, Farrell said.