This NL Midweek Series Matchups column will cover seven three-game series and one four-game set.

This AL Midweek Series Matchup column previews one four-game series and six three-game series.

After missing all of 2011, Jason Castro is seeing extensive playing time for the Astros with not much to show for it—yet. We also look at the impact of Torii Hunter's return to the Angels as well as some old faces back in familiar places. And is a legend being born in Detroit?

Carlos Beltran (OF, STL) made his first CF start since 2010 Friday, making room in the lineup for both Allen Craig (OF/1B, STL), activated from the DL to start in RF, and recent callup Matt Adams (1B, STL). Adams is 13-for-41, with an .890 OPS, while playing 1B regularly since Lance Berkman (1B/OF, STL) underwent knee surgery for a torn meniscus, likely sidelining him until August.

With Roy Halladay and Jered Weaver landing on the disabled list week, the fallacy that some players were shielded from going on the DL has been exposed.

A handful of high-profile players hit the DL: Tulowitzki, Kemp, Markakis. Plus in Atlanta, a rookie shortstop shakeup and much ado about eyeglasses.

This NL Weekend Series Matchup column previews two four-game series and six three-game series.

Lined Up for a Run at First: The Angels can dent the Rangers' 5-1/2 game AL West lead in this weekend's big showdown in Southern California.

The struggling Tigers have acknowledged the need to make some changes, and a first step was taken with the demotion of Ryan Raburn (2B, DET) to AAA-Toledo. While in Cleveland, Travis Hafner is headed for knee surgery.

It's never fun to lose an ace. But that's just what the Phillies and Angels—and the fantasy owners of Roy Halladay and Jered Weaver—are having to deal with. Who will fill in, and what chances do they have to succeed?

Lonnie Chisenhall should see plenty of AB with Jack Hannahan down, but Jose Lopez keeps hitting. Matt Kemp returns to LA as Ted Lilly hits the DL, and more ...