FILE - In this April 8, 2017, file photo, San Francisco Giants starting pitcher Madison Bumgarner throws to a San Diego Padres batter during the first inning of a baseball game in San Diego. Bumgarner returns to the mound Saturday for the first time since a dirt bike accident led to a sprained AC joint in his pitching shoulder and bruised ribs. (AP Photo/Alex Gallardo, File)
San Francisco Giants starting pitcher Madison Bumgarner throws during the first inning of a baseball game against the Kansas City Royals on Wednesday, April 19, 2017, in Kansas City, Mo. (AP Photo/Charlie Riedel)
San Francisco Giants starting pitcher Madison Bumgarner throws during the first inning of the team's baseball game against the Kansas City Royals on Wednesday, April 19, 2017, in Kansas City, Mo. (AP Photo/Charlie Riedel)
San Francisco Giants starting pitcher Madison Bumgarner throws against the San Diego Padres during the first inning of a spring training baseball game, Tuesday, March 21, 2017, in Scottsdale, Ariz. (AP Photo/Matt York)
San Francisco Giants starting pitcher Madison Bumgarner throws against the San Diego Padres during the first inning of a spring training baseball game, Tuesday, March 21, 2017, in Scottsdale, Ariz. (AP Photo/Matt York)
San Francisco Giants pitcher Madison Bumgarner works against the Washington Nationals in the first inning of a baseball game Sunday, Aug. 16, 2015, in San Francisco. (AP Photo/Ben Margot)
San Francisco Giants pitcher Madison Bumgarner holds up the trophy after their win in Game 7 of baseball's World Series against the Kansas City Royals Wednesday, Oct. 29, 2014, in Kansas City, Mo. (AP Photo/Charlie Riedel)
San Francisco Giants pitcher Madison Bumgarner, left, and Buster Posey celebrate after winning 3-2 to win the series over Kansas City Royals after Game 7 of baseball's World Series Wednesday, Oct. 29, 2014, in Kansas City, Mo. (AP Photo/Matt Slocum)
San Francisco Giants starting pitcher Madison Bumgarner, left, and catcher Buster Posey celebrate 3-2 win against the Kansas City Royals in Game 7 of baseball's World Series Wednesday, Oct. 29, 2014, in Kansas City, Mo. (AP Photo/Charlie Riedel)
San Francisco Giants pitcher Madison Bumgarner throws during the fifth inning of Game 7 of baseball's World Series against the Kansas City Royals Wednesday, Oct. 29, 2014, in Kansas City, Mo. (AP Photo/David J. Phillip)
San Francisco Giants starting pitcher Madison Bumgarner talks to the media before baseball practice Monday, Oct. 20, 2014, in Kansas City, Mo. The Kansas City Royals will host the San Francisco Giants in Game 1 of the World Series on Oct. 21. (AP Photo/Orlin Wagner)
San Francisco Giants starting pitcher Madison Bumgarner throws during a team workout Saturday, Oct. 18, 2014, in San Francisco. The Giants are scheduled to play the Kansas City Royals in Game 1 of baseball's World Series on Tuesday in Kansas City, Mo. (AP Photo/Marcio Jose Sanchez)
Washington Nationals Bryce Harper, right, scores past catcher Buster Posey on a throwing error by San Francisco Giants pitcher Madison Bumgarner in the seventh inning during Game 3 of baseball's NL Division Series in San Francisco, Monday, Oct. 6, 2014. (AP Photo/Marcio Jose Sanchez)
San Francisco Giants' starting pitcher Madison Bumgarner singles against the St. Louis Cardinals in the first inning in a baseball game on Friday, May 30, 2014, at Busch Stadium in St. Louis. (AP Photo/Bill Boyce)
San Francisco Giants' starting pitcher Madison Bumgarner throws against the St. Louis Cardinals in the first inning in a baseball game on Friday, May 30, 2014, in St. Louis. (AP Photo/Bill Boyce)
San Francisco Giants pitcher Madison Bumgarner throws against the Minnesota Twins during the first inning of a baseball game in San Francisco, Sunday, May 25, 2014. (AP Photo/Jeff Chiu)
San Francisco Giants starting pitcher Madison Bumgarner works agaisnt the Colorado Rockies in the first inning of a baseball game in Denver on Tuesday, May 20, 2014. (AP Photo/David Zalubowski)