Koehler announced his retirement on his personal Twitter feed Monday.

EDGE Analysis

Koehler had last appeared in the majors in 2017 due to a right shoulder injury that bothered him over the past two seasons. The right-hander had been working in the Pirates' camp during spring training, but he'll opt to hang up his cleats rather than continuing to compete for a spot on a major-league pitching staff. Koehler finishes his career with a 4.39 ERA, 604 strikeouts and 36 wins over six seasons in the majors with the Marlins and Blue Jays.

Koehler was placed on Double-A Altoona's 7-day injured list Aug. 18 due to a right shoulder strain, Jason Mackey of the Pittsburgh Post-Gazette reports.

EDGE Analysis

Koehler will be shut down for the season after experiencing yet another setback with his surgically repaired throwing shoulder. After undergoing the procedure last July, Koehler didn't pitch in affiliated ball for a full year before he was cleared to begin a rehab assignment in the rookie-level Gulf Coast League earlier this month. He ultimately made just four appearances before the shoulder acted up again, resulting in a second consecutive lost season for the righty reliever. Given that he'll enter his age-34 season in 2020 with significant health concerns, the odds are against Koehler resurfacing in the big leagues again.

Koehler (shoulder) was activated from the 7-day injured list and assigned to Double-A Altoona on Tuesday, Rob Biertempfel of The Athletic reports.

EDGE Analysis

After a lengthy recovery from shoulder surgery, Koehler returned to action last week at the rookie-ball level, making three abbreviated appearances. Koehler came out of the rehab stint no worse for the wear, so he'll now gain clearance for regular relief duty at Altoona. If Koehler finds some early success, it wouldn't be surprising if he were eventually moved up to Triple-A Indianapolis, which could set the stage for him to join the Pirates as a September callup. The 33-year-old owns a 4.39 ERA and 6.9 K/9 across 161 career appearances (133 starts) over parts of six seasons in the big leagues.

Koehler (shoulder) made a rehab appearance Tuesday for the Pirates' rookie-level Gulf Coast League affiliate, retiring two of the batters he faced and yielding two runs on two hits.

EDGE Analysis

Koehler didn't look particularly good in the outing, but he was likely just elated to be back on the mound after having not logged any competitive action since spring training in 2018. Considering that he posted a 6.69 ERA and 1.62 WHIP in 72.2 innings during his last MLB season in 2017 and is now on the comeback trail following a lengthy shutdown due to shoulder surgery, the 33-year-old will face an uphill battle to make it back to the majors.

Koehler (shoulder) signed a minor-league contract with the Pirates on Wednesday, Rob Biertempfel of The Athletic reports.

EDGE Analysis

The right-hander missed all of 2018 due to a shoulder injury initially incurred during spring training. However, the Pirates were willing to take a flier on him despite the health woes and his middling 4.39 ERA in his career. Koehler is expected to spend much of the 2019 campaign rehabbing from the shoulder surgery he underwent last July, but he could offer some rotation depth later in the season if he proves to be effective upon his return.

Koehler underwent season-ending shoulder surgery Tuesday, Andy McCullough of the Los Angeles Times reports.

EDGE Analysis

Koehler won't end up throwing a single pitch for the Dodgers this season. His contract lasts just one year, so his status next season is up in the air. At that point, he'll be a 32-year-old who recorded a 6.69 ERA in 2017 and who didn't pitch at all in 2018.

Koehler (shoulder) has been throwing bullpen sessions and is scheduled to face hitters in the upcoming days, but hasn't been progressing in his recovery as quickly as the Dodgers hoped, Bill Plunkett of The Orange County Register reports. "The curveball has been good, the fastball velocity has been good," manager Dave Roberts said of Koehler. "As I understand it, when he throws a 'pen, to kind of recover and be able to bounce back and do the same thing again [is a problem]."

EDGE Analysis

Fortunately for Koehler, it doesn't sound like a physical issue is stunting his recovery from the sprained shoulder capsule, but the right-hander is struggling with his stamina between throwing sessions. That may simply be a byproduct of Koehler's extended stay on the shelf, as he was first diagnosed with the injury early in Cactus League play back in March and was idle for nearly two months before beginning a throwing program. Once Koehler demonstrates enough progress to begin a minor-league rehab assignment, he'll likely require several appearances at multiple affiliates before the Dodgers bring him back from the 60-day disabled list. Don't expect him to pitch for the big club until August at the earliest.

Koehler (shoulder) suffered a setback during rehab Sunday, J.P. Hoornstra of the Los Angeles Daily News reports.

EDGE Analysis

Koehler was aiming to return prior to the All-Star Game, but following the setback, his timetable has been moved to back to sometime in August. He's been on the shelf since suffering a sprained shoulder capsule at the beginning of March.

Koehler (shoulder) could rejoin the Dodgers before the All-Star break, Andy McCullough of the Los Angeles Times reports.

EDGE Analysis

He threw a bullpen session Monday and said he's progressing well. Once healthy, Koehler will take on a long-relief role for the Dodgers.

Koehler (shoulder) has progressed to throwing off flat ground from 75 feet, the Associated Press reports.

EDGE Analysis

Koehler kicked off a throwing program at extended spring training last week and is expected to remain in Arizona until he's ready to begin a minor-league rehab assignment. The right-hander was transferred to the 60-day disabled list shortly after Opening Day and won't be eligible for activation until late May at the soonest.