Justin Verlander SP DET 7 Hrs

Verlander left Friday's Grapefruit League game in the third inning with an apparent arm injury, MLive.com reports.

Verlander signaled for trainers after covering first base on a ground ball. The team has yet to provide an update, but Tom Gage of FOX Sports Detroit said Verlander didn't seem to be favoring anything when he ran from the dugout to the clubhouse. Reports from earlier in the day had Verlander's fastball consistently in the mid-90s.

Josh Reddick RF OAK 7 Hrs

A's manager Bob Melvin said Friday that Reddick (oblique) probably won't be ready for Opening Day but could make his debut before the end of the team's season-opening homestand, MLB.com's Jane Lee reports.

The homestand lasts seven games from Apr. 6 to Apr. 12. Reddick expects to play in games this upcoming weekend, but it sounds as if he won't quite have enough time to prepare for Opening Day. The A's thus expect to start the season with Ben Zobrist in right field and Eric Sogard at second base, Susan Slusser of the San Francisco Chronicle reports.

Tyler Clippard RP OAK 7 Hrs

A's manager Bob Melvin confirmed Friday that Clippard will start the season as the team's closer, John Hickey of the Bay Area News Group reports.

Clippard was the obvious favorite, with Sean Doolittle (shoulder) out until late April or early May. Once Doolittle is ready, Clippard will likely get most of his work in the seventh or eighth inning.

Buster Posey C/1B SF 7 Hrs

Posey (shoulder) started at first base Thursday, going 1-for-4 with a double and a run scored in the spring training loss to Oakland.

Posey was removed from Wednesday's game with scapula discomfort, but it wasn't considered serious. The fact that he was back on the field the very next day shows that even the Giants' organization doesn't view this as anything to worry about. Ideally, we would like to see Posey handle a full game behind the plate, but the Giants appear to have dodged a bullet with their star catcher.

Noel Arguelles SP KC 7 Hrs

Arguelles has been released by the Royals, Baseball America's Matt Eddy reports.

Arguelles signed a five-year, $7 million contract in 2009 when he was only 19 years old. While still only 25, the Cuban lefty has never had much luck above the High-A level.

Jeff Locke SP PIT 7 Hrs

Locke will be on the Opening Day roster, Bill Brink of the Pittsburgh Post-Gazette reports.

Although the Pirates have yet to name a winner, Locke seems to be behind Vance Worley in the competition for the final rotation spot. General manager Neal Huntington said Friday that the loser of the competition will open his season in the big-league bullpen. Such a role would leave Locke/Worley just one injury away from joining the rotation, and it's also worth noting that Charlie Morton is having a terrible spring in the wake of September hip surgery. Manager Clint Hurdle recently suggested that the team may consider keeping Morton at extended spring training for a bit.

Erik Cordier RP SF 7 Hrs

Cordier (forearm) threw off flat ground this week, but will start the year on the disabled list, CSN Bay Area reports.

Cordier has been shut down after experiencing forearm cramps this spring. The fact that he is throwing is a good sign that the injury isn't too serious, but he will start the year on the DL in order to save a spot on the 25-man roster. When healthy, Cordier regularly touches triple digits on the radar gun, but doesn't offer anything else other than an average - at best - slider.

Josh Reddick RF OAK 8 Hrs

Reddick (oblique) expects to play in a game this weekend, CSN Bay Area's Joe Stiglich reports.

Reddick upped his activity level throughout the week, and he seemingly still has a shot to be ready for Opening Day. A weekend return would leave him enough time to play as many as six or seven more Cactus League games.

Denard Span CF WAS 8 Hrs

Span (abdomen) ran sprints and took light swings with a fungo bat Friday afternoon, James Wagner of the Washington Post reports.

Span is taking another step forward in the rehab process, but there still hasn't been anything to indicate that he could return before May. Michael Taylor figures to get most of the playing time in center field until Span is ready.

Nate Jones RP CWS 8 Hrs

Jones (elbow) is scheduled to throw a bullpen session Wednesday, CSN Chicago's Dan Hayes reports.

Jones has been limited to long toss thus far, so Wednesday will mark a significant step in his progression. He's targeting a return around the All-Star break, but that may be a bit optimistic, given that he had Tommy John surgery in August.