Hendrickson announced his retirement Tuesday, CSN Mid-Atlantic's Rich Dubroff reports.

Released by the Orioles in mid-March, the 40-year-old Hendrickson has decided to call it quits. He last played in the majors leagues in 2011, and he'll retire with a 5.03 career ERA over 1,169 innings. He actually had some decent seasons as a starter in the early-to-mid 2000s, back when an an ERA around 5.00 was acceptable for a pitcher in the AL East.

Hendrickson has been released by the Orioles, Rich Dubroff of CSN Baltimore reports.

He was a long shot to make the roster, as he had not pitched in the big leagues since 2011. At age 40, Hendrickson's playing career appears to be over at this point.

Mark Hendrickson threw for the Orioles on Tuesday.

Hendrickson is currently pitching for the York Revolution of the independent Atlantic League, but he's hoping to land a minor league deal. The 40-year-old southpaw hasn't pitched in the majors since 2011.

Mark Hendrickson has signed with the York Revolution of the independent Atlantic League.

Hendrickson, 39, converted to a sidearmer last year and posted a 3.06 ERA and 37/17 K/BB ratio over 67 2/3 innings with the Orioles' Triple-A affiliate. While he failed to attract interest from MLB teams this winter, he's still trying to keep his career alive.

Orioles reassigned LHP Mark Hendrickson to Triple-A Norfolk.

Hendrickson was a longshot to make the Orioles' Opening Day bullpen. He'll represent organizational depth in 2013.

Orioles signed LHP Mark Hendrickson to a minor league contract with an invitation to spring training.

The deal was agreed to late last week then finalized on Monday morning. Hendrickson did not pitch professionally in 2012 and will have to shine this spring in Orioles camp to land a spot in the Opening Day 'pen.

The Orioles expect to announce the signing of left-hander Mark Hendrickson by early next week.

Hendrickson was out of baseball last season and hasn't pitched in the majors since 2011. The 38-year-old has switched to a sidearm delivery in an effort to rejuvenate his career and will look to win a bullpen spot with the Orioles in spring training.

Eduardo A. Encina of the Baltimore Sun reports that the Orioles plan to offer a minor league contract to left-hander Mark Hendrickson.

The deal will include a spring training invite. Hendrickson, who last pitched in the big leagues in 2011, threw bullpen sessions for the Orioles last week. The 38-year-old left-hander has switched to a sidearm delivery in an effort to rejuvenate his career.

Mark Hendrickson threw at Orioles minicamp Wednesday.

Dan Conolly of the Baltimore Sun was told that the free agent lefty "looked good" on the mound. Hendrickson will throw again on Friday before the O's decide whether to offer him a contract. He sat out the entire 2012 season.

The Orioles have scheduled to workout LHP Mark Hendrickson at their mini-camp next week.

Hendrickson was out of baseball last season, and hasn't pitched in majors since appearing in eight games with the Orioles in 2011. The 38-year-old will be considered for a spring training invite if he shows anything in camp, but is merely organizational depth at this stage of his career.

Orioles released LHP Mark Hendrickson.

Hendrickson was designated for assignment last week. The 37-year-old left-hander allowed six earned runs on 13 hits over 10 innings with the O's this season.

Orioles designated LHP Mark Hendrickson for assignment.

Hendrickson was given the boot as the Orioles did a little housecleaning on their 40-man roster. The 37-year-old left-hander has allowed six earned runs on 13 hits over 10 innings for the Orioles this season.

Orioles designated LHP Mark Hendrickson for assignment.

Hendrickson spent two days with the O's and made just one relief appearance. The 37-year-old should pass through optional waivers without an issue and remain on the 40-man roster.

Orioles recalled LHP Mark Hendrickson from Triple-A Norfolk.

Hendrickson will be with the club only for a couple days while Troy Patton is on the restricted list, though he's likely to be brought back when rosters expand. The veteran lefty allowed 13 hits and six earned runs in 10 innings for the O's earlier this season.

Orioles optioned LHP Mark Hendrickson to Triple-A Norfolk.

Hendrickson allowed 13 hits and six earned runs in 10 innings out of the Orioles' bullpen. He could be brought back later this summer to again provide bullpen depth.

Orioles recalled LHP Mark Hendrickson from Triple-A Norfolk.

Hendrickson will provide the O's with a fresh arm out of the pen. He held a 2.87 ERA in 19 appearances for Norfolk this season.

The Orioles are expected to call up Mark Hendrickson from Triple-A Norfolk to serve as a long man out of the bullpen.

Jake Arrieta lasted just 4 1/3 innings Thursday and Zach Britton retired only two batters Friday, so even though the O's have an eight-man bullpen it's quite taxed. Hendrickson has a 2.87 ERA in 19 appearances for Norfolk this season.

Orioles sent LHP Mark Hendrickson outright to Triple-A Norfolk.

Hendrickson posted a decent 3.86 ERA in 9 1/3 innings this spring, but failed to win an Opening Day roster spot. He should be back in the majors eventually.

Orioles re-signed LHP Mark Hendrickson to a minor league contract.

The Rockies, Rays and Mariners had interest, but talks never got too serious with those clubs. Hendrickson's new deal includes an invitation to spring training, where he will attempt to win a spot in the Orioles' Opening Day bullpen. He posted an ugly 5.26 ERA and 1.55 WHIP last season.

The Orioles have offered Mark Hendrickson the option of returning on a minor league contract.

The Rockies, Rays and Mariners have also expressed some interest in Hendrickson, but no one is going to give him a major league deal. Mike Gonzalez is the only left-hander that's guaranteed a spot in the Orioles bullpen, so returning to Baltimore might be the best option the 36-year-old has.