Yet another closer has been deposed, this time in Oakland, where the team is also dealing with an injury to its starting center fielder. Meanwhile, over in the National League, the Mets may be mulling a similar change, while a catcher has suffered a season-ending knee injury.

Injury week in review: torn ACLs, olbliques, hamstrings, concussions, and more!

This NL Midweek Series Matchups column will cover a pair of two-game series for each team this week. There are no off days in the NL this week, as each series will start on Monday and Wednesday.

This AL Midweek Series Matchup column previews seven two-game series which will be played on Monday and Tuesday, and seven more two-game series which will be played on Wednesday and Thursday.

Mike Trout's much ballyhooed arrival signaled a decrease in playing time for one or more Angel outfielders, but who has taken the brunt of it? We also look at the suddenly productive Oakland CI and the woeful SS situation in San Diego as well as some injury updates and the signing of an old favorite...

The White Sox were counting on Chris Sale to provide them with a huge boost to the starting rotation. The Royals felt Jonathan Sanchez will give then a number one type starter. Now both have health issues that need to be watched closely.

Chris Sale (LHP, CHW) reportedly is scheduled to start Saturday, ending his brief stint as closer seemingly before it even began. CHW had removed Sale from the rotation May 4, designating him closer amidst reports of elbow tenderness and erstwhile rookie closer Hector Santiago's (LHP, CHW) ineffectiveness. Sale will make his start with two days' rest since a one-inning May 8 relief appearance.

Earlier this week our own Doug Dennis advised patience with Sean Marshall's (LHP, CIN) near-5.00 ERA due to superior peripherals (2.28 xERA, 5.0 Cmd, 194 BPV). But when Marshall gave up three hits and a run in two-thirds of an inning in what was a 2-0 game on Wednesday, Dusty Baker came with the hook. Logan Ondrusek (RHP, CIN) finished it off by recording the final out and his first career save. Is CIN the next participant in the Great Closer Turnover Trend of 2012?

This NL Weekend Series Matchup column previews eight three-game series, all of which run Friday through Sunday.

[FREE] Casey Janssen (RHP, TOR) recorded his first save since replacing temporary closer Francisco Cordero (RHP, TOR) Wednesday with a 1-2-3 inning. Cordero was demoted from the closer role following his third Blown Save in five opportunities in spectacular fashion May 8, surrendering a game-winning Grand Slam HR to Oakland's Brandon Inge, failing to hold a one-run lead.

Looking like the O's of old: Baltimore takes on Tampa Bay this weekend in a battle for AL East supremacy.