Former Cubs closer Aroldis Chapman

Aroldis Chapman in action against the Pirates on April 22, 2017.

Aroldis Chapman smiles as he runs pickoff drills during a spring training workout on Feb. 19, 2016.

Aroldis Chapman celebrates winning the NLCS at Wrigley Field on Oct. 22, 2016.

Aroldis Chapman celebrates after winning Game 6 of the NLCS at Wrigley Field on Oct. 22, 2016.

Aroldis Chapman pitches in the 8th inning during Game 6 of the National League Championship Series at Wrigley Field on Oct. 22, 2016.

Aroldis Chapman catches a bunted pop up off the bat of the Dodgers’ Yasiel Puig to the the 9th inning during Game 2 of the NLCS at Wrigley Field on Oct. 16, 2016.

Aroldis Chapman in the bullpen at Wrigley Field on Oct. 14, 2016.

The Cubs mob Aroldis Chapman as they celebrate a 6-5, series-clinching win against the Giants in Game 4 of the NLDS on Oct. 11, 2016, at AT&T Park.

Aroldis Chapman celebrates after getting the final out against the Giants to win the NLDS on Oct. 11, 2016, at AT&T Park.

Aroldis Chapman reacts in the eighth inning against the Giants during Game 3 of the NLDS on Oct. 10, 2016.

Aroldis Chapman walks to the bullpen in the 8th inning against the Reds at Wrigley Field on September 20, 2016.

Aroldis Chapman has a laugh with Reds third base coach Billy Hatcher as Chapman walks to the bullpen in the 8th inning at Wrigley Field on September 20, 2016.

Aroldis Chapman signs autographs for young Cubs fans before a game against the Reds at Wrigley Field on September 20, 2016.

Aroldis Chapman delivers to the Milwaukee Brewers in the 10th inning on Sept. 16, 2016 at Wrigley Field.

Aroldis Chapman throws in the 11th inning against the San Francisco Giants at Wrigley Field Sept. 4, 2016.

Joe Maddon shakes hands with Aroldis Chapman after a win over the Pittsburgh Pirates at Wrigley Field on Aug. 31, 2016.

Aroldis Chapman on the mound in the 9th inning of a game against the Pittsburgh Pirates at Wrigley Field Aug. 30, 2016.

Aroldis Chapman carries a pillow to the team bus dressed in onesies after their game against the Los Angeles Dodgers at Dodger Stadium.

Aroldis Chapman walks with Willson Contreras following their victory over the Brewers at Wrigley Field, Aug. 18, 2016.

Aroldis Chapman laughs while heading to the dugout after throwing three pitches for three outs against the Cardinals in the ninth inning at Wrigley Field on Thursday, Aug. 11, 2016.

Willson Contreras and Aroldis Chapman celebrate after the final out against the Marlins at Wrigley field on Aug. 2, 2016.

Aroldis Chapman’s fastball was recorded at 104 miles per hour during the 9th inning against the Marlins at Wrigley Field on Aug. 2, 2016.

Aroldis Chapman throws against the Mariners during the eighth inning at Wrigley Field on July 30, 2016.

Aroldis Chapman throws the final pitch of the ninth inning against the White Sox at Wrigley Field on July 28, 2016. The Cubs beat the Sox 3-1.

Aroldis Chapman prepares to pitch during the eighth inning against the White Sox on July 28, 2016 at Wrigley Field.

Aroldis Chapman delivers in this multiple exposure photo during the ninth inning of a baseball game against the White Sox on July 28, 2016. Chapman recorded his first save as a Cubs beat the Chicago White Sox 3-1.

Hector Rondon, Aroldis Chapman and Pedro Strop laugh while having a conversation during warmups before the game against the White Sox at Wrigley Field on July 27, 2016.

Aroldis Chapman warms up before entering a game against the White Sox at Wrigley Field on July 27, 2016.

Aroldis Chapman meets the media in the dugout before a game against the White Sox at U.S. Cellular Field on Tuesday, July 26, 2016.

Aroldis Chapman meets the media in the dugout before a game against the White Sox at U.S. Cellular Field on Tuesday, July 26, 2016.

Aroldis Chapman hangs out in the dugout before a game against the White Sox at U.S. Cellular Field on Tuesday, July 26, 2016.

Aroldis Chapman has a laugh with Avisail Garcia before a game at U.S. Cellular Field on Tuesday, July 26, 2016.

Aroldis Chapman warms up before the Cubs’ game against the White Sox at U.S. Cellular Field on Tuesday, July 26, 2016.

Aroldis Chapman shares a laugh with Starlin Castro during the ninth inning against the Giants at Yankee Stadium on July 22, 2016, in New York.

Aroldis Chapman winds up in a heavy rain during the ninth inning against the Rangers in New York on Monday, June 27, 2016.

Aroldis Chapman throws a pitch against the Diamondbacks during the ninth inning Wednesday, May 18, 2016, in Phoenix.

Aroldis Chapman, the first player disciplined under Major League Baseball’s domestic violence policy, reacts on the mound during his Yankees debut against the Royals at Yankee Stadium in New York on Monday, May 9, 2016.

Aroldis Chapman reacts during a press conference at Yankee Stadium in New York on Sunday, May 8, 2016. Chapman was suspended for 30 games under Major League Baseball’s new domestic violence policy.

Aroldis Chapman smiles as he runs pickoff drills during a spring training workout on Friday, Feb. 19, 2016, in Tampa, Fla.

Aroldis Chapman smiles after he reached first on a missed catch error by Cubs shortstop Starlin Castro during the ninth inning Monday, Aug. 31, 2015, in Chicago.

Aroldis Chapman pitches during the ninth inning of the MLB All-Star Game on Tuesday, July 14, 2015, in Cincinnati.

Todd Frazier is congratulated by Aroldis Chapman after Frazier won the Home Run Derby on Monday, July 13, 2015, in Cincinnati.

Aroldis Chapman throws during the eighth inning of the MLB All-Star baseball game on Tuesday, July 15, 2014, in Minneapolis.

Anthony Rizzo, left, yells at Aroldis Chapman, right, during a bench-clearing scuffle in the 10th inning Thursday, July 10, 2014, in Cincinnati.

Aroldis Chapman rides with his daughter Ashanti in the annual opening day parade on Monday, March 31, 2014, in Cincinnati.

Aroldis Chapman throws during a spring training practice in Goodyear, Ariz., on Saturday, Feb. 15, 2014.

Aroldis Chapman enjoys a cigar in the dugout prior to a game against the Padres in San Diego on Monday, July 29, 2013.

Aroldis Chapman, left, hands Athletics’ Yoenis Cespedes a drink during the Home Run Derby on Monday, July 15, 2013, in New York.

Aroldis Chapman throws against the Giants in Game 5 of the National League Division Series on Thursday, Oct. 11, 2012, in Cincinnati.

Aroldis Chapman celebrates in the locker room after the Reds defeated the Dodgers to clinch the National League Central Division on Saturday, Sept. 22, 2012, in Cincinnati.

Aroldis Chapman performs a somersault after defeating the Brewers, 4-3, on Tuesday, June 26, 2012, in Cincinnati.

Aroldis Chapman smiles after catching a come-backer line drive against the Giants on Wednesday, April 25, 2012, in Cincinnati.

Reds manager Dusty Baker walks out to talk to Aroldis Chapman during the seventh inning of Game 2 of the National League Division Series against the Phillies on Friday, Oct. 8, 2010, in Philadelphia.

Aroldis Chapman walks to the dugout after pitching the seventh inning against the Brewers on Wednesday, Sept. 1, 2010, in Cincinnati.

Aroldis Chapman in action during his major-league debut against the Brewers on Tuesday, Aug. 31, 2010, in Cincinnati.

Aroldis Chapman poses before a spring training game in Phoenix on Wednesday, March 31, 2010.

Aroldis Chapman poses with Reds general manager Walt Jocketty in the press box at Great American Ballpark on Monday, Jan. 11, 2010, after the Reds announced they had signed Chapman to a six-year contract.