Guerrero cleared waivers and was outrighted to Triple-A Charlotte, James Fegan of The Athletic reports.
He will serve as organizational pitching depth after getting booted off the 40-man roster to make room for Edwin Encarnacion.
Guerrero was designated for assignment by the White Sox on Thursday.
Guerrero was claimed off waivers by the White Sox in December, but he'll be removed from the 40-man roster in order to make room for Luis Robert, who was placed on the 40-man roster after he signed an extension Thursday. Guerrero struggled in 52 major-league appearances with the Marlins in 2019, recording a 6.26 ERA with a 43:36 K:BB.
The White Sox claimed Guerrero off waivers from the Marlins on Friday.
Guerrero averaged 99 mph on his fastball last season, but he did not have much of a clue where it was going as evidenced by a 16.7 percent walk rate. Command and control have always been problems for the 6-foot-8 Guerrero, who turns 29 next month, and the Marlins gave up hope. The right-hander will compete for a bullpen role in spring training.
Guerrero was designated for assignment by the Marlins on Monday, Jordan McPherson of the Miami Herald reports.
The Marlins have cleared a space on the 40-man roster by designating Guerrero for assignment. He struggled to a 6.26 ERA and 1.70 WHIP with 43 strikeouts over 46 innings a year ago with the big-league club.
Guerrero was removed from Saturday's game against the Phillies with left groin tightness, Jordan McPherson of the Miami Herald reports.
Guerrero delivered a scoreless seventh inning and returned for the eighth, but he exited due to the groin issue after a leadoff walk. The severity of the injury remains unclear, but with the regular season wrapping up Sunday the 28-year-old's 2019 campaign is likely finished.
Guerrero (finger) was activated off the 10-day injured list Sunday.
Guerrero landed on the shelf in early August with a torn fingernail on his right middle finger, but he's ready to rejoin the Marlins after a two-game rehab stint. The 28-year-old has a 5.67 ERA, 1.66 WHIP and 40:33 K:BB across 39.2 innings this season.
Guerrero (finger) threw a 25-pitch bullpen session Friday, Andre Fernandez of The Athletic reports.
He had been throwing off flat ground, so this marks a significant step in his recovery. Look for Guerrero to rejoin the big-league bullpen sometime in September.
Guerrero (blister) has been playing catch from flat ground, Manny Randhawa of MLB.com reports.
The right-hander landed on the injured list Aug. 8 with what was described as a torn fingernail but may have been a reoccurrence of blister issues that plagued him earlier in the year. Guerrero doesn't have a set timetable for his return yet, but if he doesn't require a rehab stint he could be back in the bullpen after something close to the minimum.
Guerrero was placed on the 10-day injured list Friday with a torn fingernail on his right middle finger, Andre Fernandez of The Athletic reports.
He must have either suffered the injury or made it worse in Thursday's appearance against the Braves. Guerrero will be eligible to return Aug. 20. Tyler Kinley was recalled from Triple-A to take Guerrero's place in the bullpen.
Guerrero (finger) was activated from the 10-day injured list Tuesday, Jordan McPherson of the Miami Herald reports.
Guerrero has been out of action since late June with a blister. He's good to go after throwing three scoreless rehab innings. Austin Brice (forearm) landed on the injured list in a corresponding move.
Guerrero (finger) began a rehab assignment with High-A Jupiter on Tuesday, Andre Fernandez of The Athletic reports.
Guerrero struck out one and walked on in a scoreless inning of work. He's expected to make another rehab outing Thursday and could be back in the majors soon after that, as he's only been out since June 28.
Guerrero (finger) was cleared to start a throwing program Tuesday, Andre Fernandez of The Athletic reports.
Guerrero was placed on the 10-day injured list Friday due to a blister on his right middle finger, but he's already been given the green light to resume throwing. It remains to be seen if he'll be ready to come off the shelf immediately following the All-Star break.
Guerrero was placed on the 10-day injured list Friday with a right middle finger blister, Jordan McPherson of the Miami Herald reports.
The move is retroactive to Thursday, meaning Guerrero will be eligible to return for the Marlins' final game before the All-Star break, should he prove ready. Guerrero is averaging close to 99 mph on his fastball, but command and control remain an issue -- he has the second-worst walk rate among qualified relievers at 17.4 percent.
Guerrero has posted a 6.00 ERA, 1.89 WHIP and 5:9 K:BB through nine innings in June.
Those K:BB numbers aren't accidentally reversed. The right-hander has walked a batter an inning in June after a brutal outing Wednesday in which he issued four free passes, and he's also hit two batters and uncorked two wild pitches on the month. Guerrero's triple-digit fastball will keep him in the Marlins' bullpen plans for now, but don't expect him to get many high-leverage chances until he can learn to harness it consistently.
Guerrero gave up two hits and struck out one in a scoreless eighth inning Wednesday to record his third hold of the season in a win over the Tigers.
His first four pitches hit triple digits on the radar gun. Guerrero continues to fill a setup role for the Marlins, although the offense hasn't provided the bullpen with many leads to protect. The right-hander now sports a 2.61 ERA, 1.26 WHIP and 25:15 K:BB through 20.2 innings on the year.
Guerrero gave up a run on two hits and a HBP while recording only one out in Wednesday's loss to Cleveland.
The right-hander had given the Marlins 10 straight scoreless appearances to begin the year, but Guerrero finally stumbled Wednesday. He still boasts a 0.90 ERA to go with a 12:7 K:BB through 10 innings, but despite his triple-digit fastball, he'll need to sharpen his control if he wants to get a chance at higher-leverage work.
Guerrero threw 11 pitches that hit 100 mph or better on the radar gun during a scoreless inning of relief Friday, Joe Frisaro of MLB.com reports.
He hit triple digits on seven straight pitches at one point, an absolutely overpowering display of heat. The key to Guerrero's long-term potential is refining his control and sharpening his slider, and the 28-year-old is showing signs of both in the early going. He's got a 0.00 ERA and 5:2 K:BB through 4.2 innings, and it wouldn't be surprising to see Guerrero leading the Marlins in saves by the end of the year.
Guerrero struck out two in a perfect sixth inning during Thursday's loss to the Rockies.
The flamethrower touched 99 mph with his fastball in overpowering the bottom of the Colorado order. Guerrero is one of a number of raw but intriguing arms in the Miami pipeline, and if he can sharpen his control, the 6-foot-8 right-hander could work his way into the Marlins' unsettled closer mix before the season is over. Guerrero still has a lot to prove before he should be viewed as anything more than a lottery ticket for fantasy purposes, however.
Guerrero struck out two in a perfect inning of relief during Thursday's Grapefruit League game against the Astros.
The flamethrowing right-hander has yet to give up a run this spring in 4.2 innings -- in fact, he's only allowed one hit -- but his 3:2 K:BB is a reminder that despite his triple-digit fastball, Guerrero is still a work in progress. He'll open the season in a set-up role for a Marlins bullpen that doesn't have an established closer, which does make him an intriguing saves lottery ticket in deeper formats, but Guerrero will need to show improved control and a more developed offspeed pitch to have a real shot at ninth-inning success.
Guerrero (back) was reinstated from the 10-day DL prior to Tuesday's game, Andre Fernandez of the Miami Herald reports.
Guerrero will return to the Marlins' bullpen following a four-week stay on the disabled list due to a left lumbar strain. He was able to appear in three minor-league games while on a rehab assignment, and should be ready for action heading into Tuesday's tilt with Atlanta.
|9/29/2019 vs Philadelphia|
|Last 7 Games|
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|Minor League Pitching Stats|
|2013||AFX-Fort Wayne Tincaps||3.2||4||0||0||0||1||0||4||8||8||8.44||5.000|
|2014||AFX-Fort Wayne Tincaps||36.0||25||0||0||6||1||1||42||12||22||1.00||0.944|
|2014||AFA-Lake Elsinore Storm||13.2||14||0||0||0||0||3||14||8||10||2.73||1.364|
|2015||AAA-El Paso Chihuahuas||13.2||11||0||0||0||0||1||15||11||8||4.09||1.439|
|2015||AA-San Antonio Missions||42.1||37||0||0||1||5||13||46||20||33||2.78||1.259|
|2016||AAA-El Paso Chihuahuas||12.0||13||0||0||0||0||0||11||9||12||6.00||1.750|
|2016||AA-San Antonio Missions||23.2||19||0||0||0||3||0||25||10||20||5.04||1.293|
|2017||AAA-New Orleans Zephyrs||15.1||13||0||0||3||2||0||11||12||12||5.96||1.589|