Magill announced his retirement via his personal Twitter account Thursday.

EDGE Analysis

Magill calls an end to his 13-year career after not seeing action at the major-league or minor-league level in 2021. A 31st-round draft pick in 2008, Magill finishes his career with a 4.63 ERA over 149.2 innings in the bigs.

The Mariners released Magill on Saturday.

EDGE Analysis

Seattle will let Magill pursue opportunities with other organizations after he failed to secure a spot in the Opening Day bullpen while attending big-league camp as a non-roster invitee. The 31-year-old posted a 6.10 ERA and 1.45 WHIP over 11 relief appearances with Seattle in 2020 before getting shut down in mid-September with a shoulder injury that required surgery.

Magill (shoulder) worked around three walks during a scoreless sixth inning in a Cactus League tie with the White Sox on Friday, a game that marked his spring debut.

EDGE Analysis

Magill underwent shoulder debridement surgery last September and was originally estimated to need a bit longer to be ready for game action this spring. Consequently, it was encouraging to see the veteran right-hander back on the mound within the first week of the Cactus League schedule as he begins his quest to garner an Opening Day bullpen spot following a difficult 2020 (6.10 ERA, 1.45 WHIP across 10.1 innings).

Magill (shoulder) returned to Seattle on a minor-league contract Thursday, Corey Brock of The Athletic reports.

EDGE Analysis

Magill elected free agency rather than accept an outright assignment to the minors in late October, but he'll wind up back in the Mariners' minor-league system nonetheless. The righty recorded a 6.10 ERA and 1.45 WHIP in 10.1 innings this season before being shut down with a shoulder injury which eventually required surgery. He's expected to be ready to go by spring training.

Magill (shoulder) became a free agent Thursday after refusing an outright assignment to Triple-A Tacoma.

EDGE Analysis

Magill struggled in his 11 relief appearances this season, posting a 6.10 ERA in 10.1 innings. He strained his shoulder in late August and wound up requiring surgery. Those two factors don't bode well for his prospects in free agency this winter, though his respectable 3.94 ERA over the previous two seasons could give teams reason to bet on a bounceback.

Magill underwent surgery on his right shoulder Tuesday.

EDGE Analysis

Magill was already slated to miss the remainder of the regular season after being transferred to the 45-day injured list. He underwent arthroscopic debridement surgery on his right shoulder Tuesday to aid in his recovery process. He's expected to begin his rehabilitation process immediately and should be ready in time for spring training in 2021.

The Mariners transferred Magill (shoulder) to the 45-day injured list Sunday.

EDGE Analysis

The transaction spells an end to Magill's season, as the Mariners determined he wouldn't have sufficient time to recover from his right shoulder strain before the team wraps up its schedule in late September. Magill was believed to be a candidate to close for the Mariners heading into the season, but he blew both of the save chances he received prior to being shut down with the injury. His move to the 45-day IL opens up a spot on the 40-man roster for reliever Seth Frankoff.

Magill was placed on the 10-day injured list with a right shoulder strain Friday.

EDGE Analysis

Magill had a very strong start to the season over his first eight appearances, but he's struggled in recent games. The right-hander gave up two runs on three hits and no walks while striking out one over two-thirds of an inning, but his injury could help provide an explanation for his recent woes. It's unclear how much time Magill will miss. Zac Grotz was recalled from the Mariners' alternate training site in a corresponding move.

Magill allowed five runs on four hits and two walks in two-thirds of an inning, taking the loss versus the Dodgers on Monday.

EDGE Analysis

Magill was the victim of the Dodgers' five-run rally in the seventh inning, and he exited the contest after Enrique Hernandez's two-run homer. Monday was the first time Magill allowed a run this season -- the bad outing put his ERA at 5.19 with a 1.38 WHIP and nine strikeouts in 8.2 innings. The 30-year-old has been better than his numbers show and remains a key part of the Mariners' bullpen.

Magill, who's fired seven scoreless innings across seven appearances thus far this season, has succeeded by taking a more aggressive approach and also incorporating more breaking pitches with effectiveness, Greg Johns of MLB.com reports. "I'm really happy for Matt," manager Scott Servais said. "He has two awesome breaking balls. He throws the curveball hard down, and the slider with it. We haven't seen the velocity we saw sometimes last year, but the command of his breaking balls and the late bite to it is really effective."

EDGE Analysis

Magill dealt with shoulder issues during spring training, and just when he was ready to jump into game action, play was paused for four months due to the COVID-19 pandemic. The right-hander also began experiencing issues with the shoulder again while working out in his home during the shutdown, and he's still working on regaining his fastball velocity as a result. Magill is averaging 92.1 mph on his heater at the moment, which represents a tumble of 3.1 mph from last season's 95.2 mph figure. However, he's been able to rely on his slider with success and has thrown it 41.7 percent of the time in 2020, compared to 18.8 percent last season. Like everyone else in the Mariners' bullpen, his role remains fluid, so he could eventually see some save chances after closing out five games successfully at the tail end of last season.