Alexi Casilla left workouts Tuesday with a possible hamstring issue.

Casilla, a non-roster invitee this spring, walked off the field with head athletic trainer Richie Bancells. The Orioles should pass along an update soon.

Orioles re-signed IF Alexi Casilla to a minor league contract.

The deal also includes an invitation to big league camp. The Orioles previously declined their $3 million option on Casilla for 2014, giving them the opportunity to get him back on a much more team-friendly deal. Casilla could only muster a .563 OPS in 2013, but provides a little bit of speed and plus-defense at second base or shortstop.

Orioles declined INF Alexi Casilla's $3 million option for 2014.

They'll pay him a $200,000 buyout instead. Casilla batted a putrid .214/.268/.295 with one home run and nine steals over 62 games this season for the O's. He'll surely have to settle for a utility job this winter.

Alexi Casilla is not expected to play in the final four games of the season.

Casilla is still dealing with some lightheadedness and thumb soreness as a result of his collision with teammate Nick Markakis on Monday, so there's just not enough time for him to get back on the field. The 29-year-old has batted .214/.268/.295 with one home run and nine steals over 62 games this season.

Alexi Casilla has displayed concussion symptoms.

Casilla as injured when he collided with outfielder Nick Markakis during Monday's game. He'll have to be cleared by MLB before returning to action, but there's a good chance his season is over with just a few games left in the schedule.

Alexi Casilla (head) will undergo a CT scan.

Casilla was injured when he collided with outfielder Nick Markakis during Monday's game. He was feeling woozy in the dugout and will not fly with the Orioles back to Baltimore.

Alexi Casilla left Monday's game against the Rays after his head collided with outfielder Nick Markakis.

Casilla was in the process of making an incredible catch on a Wil Myers blooper, but his head collided with Markikis' quad and then the turf, knocking the ball loose. Although he initially stayed in the game, Casilla was cleared woozy, so it's no surprise that he was eventually removed. He'll surely undergo concussion tests.

Alexi Casilla belted a three-run homer in Tuesday's win over the Indians.

The longball -- which was his first of the season -- came off of Justin Masterson during a decisive five-run seventh innings for the O's. It's just Casilla's 12th career homer in 1,847 plate appearances. He's batting just .216 for the season.

Alexi Casilla is starting at second base for the Orioles Sunday.

It's his first start since he jammed his right index finger a week ago. Casilla returned to action on Saturday and got doubled up at first base as a pinch-runner to end the game.

Alexi Casilla (finger) is available to hit Friday.

Casilla hasn't played since he jammed his right index finger on Sunday, but he made it through batting practice Friday with no issues. He should return to the lineup soon enough.

Alexi Casilla (finger) is not in the Orioles' starting lineup on Thursday evening against the Red Sox.

Casilla has missed four straight games with a jammed right index finger. He is still being called day-to-day.

Alexi Casilla (finger) is out of the Orioles' lineup for the third straight day Wednesday.

Casilla hasn't played since he jammed his right index finger on Sunday, but the swelling has gone down and he was able to throw Wednesday. He's still considered day-to-day.

Alexi Casilla (finger) is out of the Orioles' lineup for the second straight day Tuesday.

Casilla jammed his right index finger on Sunday and apparently needs at least one more day to recover. Ryan Flaherty is filling in at second base.

Alexi Casilla will not be available Monday against the Angels due to a jammed right index finger.

Casilla suffered the injury sliding into second base on a stolen base attempt on Sunday. The good news is that it's not a major concern and he expects to return Tuesday.

Alexi Casilla will hit left-handed on Friday night, but he's expected to eventually hit exclusively from the right side moving forward.

It's interesting, as the switch-hitting Casilla actually has a higher OPS from the left side of the plate during his career. Still, the Orioles think that he drives the ball better from the right side. We don't expect it to make much of a difference either way.

Orioles and 2B Alexi Casilla avoided arbitration by agreeing to a contract.

Terms of the deal have not yet been disclosed. With the uncertainty surrounding Brian Roberts, the 28-year-old has a strong chance of gaining valuable playing time with the O's in 2013.

Orioles claimed INF Alexi Casilla off waivers from the Twins.

The Twins were going to non-tender Casilla anyway, as he's due a raise in arbitration after making $1.3825 million this season. The 28-year-old will provide insurance at second base with Brian Roberts' uncertain status. Casilla hit just .241/.282/.321 with one homer and 21 steals this season.

The Twins are expected to non-tender Alexi Casilla.

Casilla made $1,382,500 this season and is arbitration-eligible for the final time this winter. However, the Twins aren't prepared to give him a raise after he batted just .241/.282/.321 with one homer, 30 RBI, 21 stolen bases and a .603 OPS this year.

Alexi Casilla had a great day at the dish in Saturday's 12-5 win over the Indians, going 2-for-4 with four RBI.

Casilla smashed a two-run triple off Justin Masterson in the fifth inning, and added a two-run double off him in the sixth frame. The 27-year-old shortstop has been a bit of a disappointment this season, hitting just .229 with no homers and 20 RBI

Alexi Casilla went 3-for-3 with a triple, RBI and walk in Sunday's loss to the Tigers.

The four times on base were a season high for Minnesota's .248/.292/.322 hitting second baseman. With no power and only average speed, Casilla remains a highly-ordinary option for AL-only league players.