By Ben Sullivan

This is a make or break year for Phillies outfielder Domonic Brown, and it is beginning to look like he is not going to be healthy enough to play when the bell rings for opening day on April 6.

Brown underwent an MRI last Friday that revealed no tear in his left Achilles, but he does have moderate tendinitis.

Brown is listed as day to day, but he could be out of Grapefruit League games for up to a week.

Brown left Thursday night’s game against the Yankees in the third inning due to soreness in his left Achilles, and he revealed that the tendon had been bothering him for several weeks.

Brown said he began to feel soreness in the area when he started chasing after Yankees third baseman Chase Headley’s second-inning home run at George M. Steinbrenner Field.

“I want to be in there, spring training or not,” Brown told reporters on Thursday night. “I feel pretty good at the plate. I don’t want to miss any time, but this is part of the game, also. I’m definitely frustrated for sure. It seemed like we were going in the right direction, it was getting a little bit better.”

Brown is hitting .241 (7-for-29) this spring. The Phillies are hoping for a bounce-back campaign from the 27-year-old, who hit .235/.285/.349 with 10 home runs last year after a breakout, All-Star 2013 season in which he hit .272/.324/.494 with 27 homers.