BOSTON - After making his third major-league start Tuesday night, Justin Masterson got to stay put and will be with the team, presumably until Daisuke Matsuzaka returns from the disabled list.

That will enable Masterson to get into a more regular between-start routine, rather than returning to a minor-league assignment, as he did following his first two starts for the Sox.

“I think it will be good for him,” said Red Sox manager Terry Francona. “Instead of packing up, he can get his work done and watch us play. Just to soak up the atmosphere, learn more about his teammates. He can get a feel of the dugout and what guys talk about during the game.”

Masterson is expected to start against Seattle on Sunday at Fenway Park.

skrasner@projo.com