March 31, 1997: Rico Rossy was signed as a Free Agent with the Montreal Expos.
Spring training
The Expos held spring training at West Palm Beach Municipal Stadium in West Palm Beach, Florida – a facility they shared with the Atlanta Braves – for the last time in 1997. It was their 21st season at the stadium; they had conducted spring training there from 1969 to 1972 and since 1981. In the final spring training game at Municipal Stadium, held on March 26, 1997, the Expos defeated the Braves 2-0. The following season, the Expos moved their spring training activities to Roger Dean Stadium in Jupiter, Florida.
Regular season
In 1997, Pedro Martínez posted a 17-8 record for the Expos, and led the league in half a dozen pitching categories, including a 1.90 ERA, 305 strikeouts and 13 complete games pitched, and won the National League Cy Young Award. Pedro Martínez was also the first right-handed pitcher to reach 300 strikeouts with an ERA under 2.00 since Walter Johnson in 1912. The 13 complete games were tied for the second-highest single-season total in all of baseball since Martínez's career began. However, this 1997 total is by far the highest in Martínez's career, as he has only completed more than 5 games in one other season.
May 7, 1997 – The Expos set a team record in runs scored in one inning as they score 13 runs off of Julián Tavárez, Jim Poole, and Joe Roa of the San Francisco Giants at 3Com Park. The Expos would go on to defeat the Giants 19 to 3. The only non-pitcher on the Expos to not register a hit was Sherman Obando who went 0 for 1. An up-and-coming prospect named Vladimir Guerrero hit his first career double and was struck by his second career pitch. A crowd of 9,958 were on hand to witness it in San Francisco.
May 20, 1997: Torey Lovullo was released by the Montreal Expos.
July 25, 1997: Omar Daal was selected off waivers by the Toronto Blue Jays from the Montreal Expos.
July 31, 1997: Jeff Juden was traded by the Montreal Expos to the Cleveland Indians for Steve Kline.
September 25, 1997: Lee Smith was released by the Montreal Expos.
Roster
Interleague Play
June 30 – The first interleague game between the Montreal Expos and the Toronto Blue Jays took place at SkyDome. The Expos won the game by a score of 2-1.
