Oakland Athletics left-hander Brett Anderson is considered day-to-day after leaving yesterday's spring training contest with a strained right trapezius, the team has announced.

He strained his what?

OK, the trapezius is a muscle that extends from the neck to roughly the middle of one's back. Considering Anderson is left-handed, the injury is to the non-throwing side of his neck/back.

Anderson sustained the injury during the first inning of yesterday's exhibition contest against the Arizona Diamondbacks. He collided with Adam Eaton around third base and left the game after throwing only eight pitches.

Following the game, Anderson told reporters, including Tyler Emerick of MLB.com, that his neck muscle "spazzed up" on him. However, he's not too worried about the strain, and the team is considering him day-to-day.

While Anderson could sit through his next scheduled start, there's a chance this spring setback won't stop him from taking the mound on Opening Day. He could resume throwing from a mound this week.

Anderson broke onto the scene in 2009, maintaining an ERA of 4.06 over 30 starts for the A's. However, he's been limited by injuries to 19, 13 and six starts over the past three seasons. The 25-year-old owns a career ERA of 3.57 over parts of four seasons in the majors.