An MRI performed on Philadelphia Phillies first baseman Ryan Howard showed he had a torn meniscus in his left knee and is expected to sidelined 6-8 weeks, multiple media outlets reported.
That prognosis means Howard is unlikely to return until late August, so if there are any setbacks, he could be out for the rest of the season.
Howard struggled last season after returning from a torn Achilles' tendon. He got off to a slow start this year as well, but since June 1 he was hitting .287 with four homers.
For the season, Howard is batting .266 with 11 home runs in 80 games.
Howard, 33, is making $20 million this season. The Phillies owe him $25 million per season for 2014, 2015, and 2016. There is a $23 million team option or $10 million buyout for 2017.
---The Milwaukee Brewers have activated outfielder Ryan Braun, but third baseman Aramis Ramirez was put back on the disabled list for the second time this season due to a left knee injury.
Braun had been sidelined since June 9 due to a right thumb contusion, and he wasn't expected to be activated until at least Thursday. He is batting .304 this season with nine homers.
--The Washington Nationals acquired outfielder Scott Hairston from the Chicago Cubs for Class A pitcher Ivan Pineyro, according to multiple reports.
Fox Sports was first to report the trade. CBS Sports confirmed that Pineyro was part of the deal.
Hairston, 33, is batting .163 in 111 plate appearances.
---Colorado Rockies right-hander Roy Oswalt is expected to be placed on the disabled list, according to the Denver Post.
Oswalt left Sunday's start against the Arizona Diamondbacks in the second inning with a hamstring injury. He was injured while covering home after throwing a wild pitch.
Oswalt has allowed 15 runs in 17 2/3 innings over four starts for the Rockies this season.
---The San Francisco Giants placed backup third baseman Joaquin Arias on the disabled list after having an emergency appendectomy on Sunday night, the San Francisco Chronicle reported.
The club recalled infielder Nick Noonan from Class AAA Fresno.
Arias will miss at least 15 days. He was batting .282 with no home runs and 10 RBI in 110 at-bats.