Justin Masterson SP BOS 7 Days

Masterson agreed to terms with the Red Sox on Thursday, ESPN reports.

After opening the season as the Indians' ace, Masterson experienced knee issues that landed him on the disabled list. After a deadline deal that sent him to St. Louis, the Cardinals made the call to move him to the bullpen, where he posted a disappointing 3-3 record and 7.04 ERA. It's unclear how the Sox intend to use Masterson, who began his major league career in Boston, but he'll likely be given an opportunity to prove he can return to a starting role.

Justin Masterson SP BOS 4 Months

Masterson has been moved to the bullpen, MLB.com reports.

Manager Mike Matheny has yet to name a starter for Thursday's opener against Milwaukee, but he has ruled Masterson out as an option, meaning it will be either Marco Gonzalez or Tyler Lyons. Masterson gave up five runs on six hits over 4.1 innings Saturday against the Cubs, marking the fourth time he's given up five runs in six turns with St. Louis.

Justin Masterson SP BOS 4 Months

Masterson was hit hard in the first game of a double-header with the Cubs Saturday, lasting just 4.1 innings and giving up five runs on six hits and a walk while striking out five.

Three of the six hits were home runs as Masterson's struggles continue since being acquired in late-July. His spot in the rotation is definitely in jeopardy at this point and with Marco Gonzales pitching well Saturday night, and Michael Wacha nearing a return, it's possible he may have made his last start of the season for the Cardinals.

Justin Masterson SP BOS 4 Months

Masterson will likely pitch only from the stretch in an effort to simplify his delivery, the St. Louis Post-Dispatch reports.

Masterson has a 7.43 ERA in five starts since the Cardinals acquired him in late August. He'll abandon the windup in the hopes of saving his spot in the rotation.

Justin Masterson SP BOS 4 Months

Masterson struggled through three innings Sunday against the Phillies, allowing five runs on six hits and two walks.

Masterson struck out three on the day, but had another bad outing for the Cardinals, and now sports a 7.43 ERA with his new club through five starts. His command was a problem again, only throwing eight of 17 first pitch strikes on the day. Masterson will look to turn things around when his next scheduled start comes Saturday against the Cubs.

Justin Masterson SP BOS 4 Months

Masterson allowed four runs on five hits with two walks and five strikeouts over five innings in an extra inning win against the Reds on Tuesday

Masterson had another stinker of a start. That makes three out of four poor outings since joining the Cardinals at the trade deadline. The right-hander is 2-1 with a bloated 6.30 ERA for St. Louis. He will try to get things rolling Sunday in Philadelphia.

Justin Masterson SP BOS 4 Months

Masterson (6-7) enjoyed his best start as a Cardinal, throwing seven shutout innings versus the Marlins in a 5-2 win Wednesday.

Masterson had given up five runs in each of his first two starts since the July 30 trade to St. Louis. Wednesday's gem brings the right-hander's record to 2-1 for the Cardinals. Masterson will try to keep it going Monday against the Reds.

Justin Masterson SP BOS 4 Months

Masterson lasted just four batters into the third inning Friday night versus the Cardinals, allowing five earned runs on seven hits and three walks while picking up a couple of strikeouts.

Masterson has had an extremely rough beginning to his tenure in the Cardinals' rotation. In two starts since being acquired from the Indians, the big right-hander has been hammered for 10 earned runs across eight innings. Masterson will be searching for bounce-back performance Wednesday in Miami.

Justin Masterson SP BOS 5 Months

Cardinals acquired RHP Justin Masterson from the Indians in exchange for OF James Ramsey.

Masterson has struggled in his walk season, posting a 5.51 ERA over 19 starts. However, he's dealt with a knee issue and the Cards are hopeful that he'll pick things up if that injury is behind him. He should also certainly benefit from a move to the National League. Masterson will make his Cardinals' debut on Saturday against the Brewers.

Justin Masterson SP BOS 5 Months

MLB.com's Peter Gammons reports that the Cardinals are set to acquire Justin Masterson from the Indians.

The New York Post's Joel Sherman says the Cardinals will send James Ramsey to the Indians in the deal. Masterson has struggled in his walk season, posting a posting a 5.51 ERA over 19 starts. He's battled a knee injury, though, and the Cards are obviously hoping he's healthy and can improve in a move to the National League. Masterson should make his Cardinals' debut on Saturday against the Brewers. St. Louis presumably is out of picture for Jon Lester and David Price now.