[1][2] After the 2019 season, Mike Fiers alleged that the 2017 Astros used technology to illicitly steal their opponents' signs and relay it to their hitters.
On March 9, it was announced that the Pittsburgh Pirates and St. Louis Cardinals would play a game at the minor league BB&T Ballpark in Williamsport, Pennsylvania, on August 20.
[8][9] As a consequence of Hurricane Harvey damaging the Houston area, the three-game Lone Star Series between the Texas Rangers and Houston Astros from August 29 to 31 was moved from Minute Maid Park to Tropicana Field in St. Petersburg, Florida.
[11] The Astros returned to Minute Maid Park for a three-game series with the New York Mets, beginning with a split doubleheader on September 2.
[12] The Tampa Bay Rays' three-game set with the New York Yankees from September 11 to 13 was moved from Tropicana Field to Queens' Citi Field due to Hurricane Irma's impending landfall on the Tampa Bay Area.
For the 2017 season, the TrackMan component of Major League Baseball's Statcast platform has replaced the previous PITCHf/x system for official measurements of pitch speed.
The Kansas City Royals unveiled an updated version of their gold-trimmed white uniform, featuring gold numbers and blue lettering.
It was paired with a blue cap featuring the gold 'KC' lettering, and was worn on Friday home games.
The Washington Nationals unveiled a white alternate uniform featuring the 'curly W' logo in a Stars and Stripes design.
They also promoted their white-paneled home caps to alternate status after wearing them once the past two seasons.
The red caps that were formerly paired with the cream uniforms will now be worn with the navy alternates at select home games.
The Cincinnati Reds changed their caps on Military Appreciation nights from camo to olive, with a white horseshoe "C".
The Pittsburgh Pirates changed their caps on Thursday home games to mustard, while still wearing their camo jerseys.
The Seattle Mariners replaced their compass logo with their original M-shaped trident updated in current team colors.
Tampa Bay Rays added a powder blue cap with a white front panel, featuring their starburst logo.
Players, managers, coaches and umpires wore #42 on April 15, the 70th anniversary of Jackie Robinson's debut in the majors.
The Reds and Giants wore Spanish language "Los Rojos" and "Gigantes" uniforms May 5, Cinco de Mayo.
All 30 teams wore pink-colored caps and jerseys, undershirts and socks May 13 and 14, Mother's Day.
The Reds wore camo uniforms May 20, June 6 (the 73rd anniversary of D-Day), August 4 and September 19.
Teams wore green-colored caps and jerseys, undershirts and socks May 27, May 28 and 29, Memorial Day in the United States.
The Blue Jays didn't wear them on May 27 and 28, but did May 29, even though Memorial Day is not a holiday in Toronto, the province of Ontario, or anywhere in Canada.
The Rays wore blue "fauxback" uniforms for the first game of a doubleheader against the Athletics June 10.
All teams wore blue-colored caps and jerseys, undershirts and socks June 17 and 18, Father's Day.
The uniforms have a shamrock on the right sleeve and the Reds script wordmark on the front, instead of the player's number and the "C" logo.
The first regular season game at SunTrust Park was on April 14, 2017, against the San Diego Padres.
ESPN also had national exclusivity for the Cubs home opener and World Series/NLCS pennant raising ceremony on April 10.