- November 6, 1997: Jim Leyritz was traded by the Texas Rangers with Damon Buford to the Boston Red Sox for Mark Brandenburg, Bill Haselman, and Aaron Sele.
- November 17, 1997: Bret Saberhagen was signed as a Free Agent with the Boston Red Sox.
- November 18, 1997: Pedro Martínez was traded by the Montreal Expos to the Boston Red Sox for a player to be named later and Carl Pavano. The Boston Red Sox sent Tony Armas (December 18, 1997) to the Montreal Expos to complete the trade.
- November 21, 1997: Mike Benjamin was signed as a Free Agent with the Boston Red Sox.
- March 19, 1998: Midre Cummings was selected off waivers by the Boston Red Sox from the Cincinnati Reds.
Record vs. opponents
1998 American League Records
- June 2, 1998: Mark Teixeira was drafted by the Boston Red Sox in the 9th round of the 1998 amateur draft, but did not sign.
- June 20, 1998: Jim Leyritz was traded by the Boston Red Sox with Ethan Faggett (minors) to the San Diego Padres for Carlos Reyes, Mandy Romero, and Darío Veras.
- July 31, 1998: Greg Swindell was traded by the Minnesota Twins with Orlando Merced to the Boston Red Sox for John Barnes, Matt Kinney, and Joe Thomas (minors).
Starters by position
Note: G = Games played; AB = At Bats; H = Hits; R = Runs; HR = Home Runs; RBI = Runs Batted In; Avg. = Batting Average; Slg. = Slugging Average; SB = Stolen Bases
Note: G = Games played; AB = At Bats; H = Hits; Avg. = Batting Average; HR = Home Runs; RBI = Runs Batted In
- 1 2 Jim Leyritz Statistics - Baseball-Reference.com
- ↑ Bret Saberhagen Statistics - Baseball-Reference.com
- ↑ Pedro Martinez Statistics - Baseball-Reference.com
- ↑ Mike Benjamin Statistics - Baseball-Reference.com
- ↑ Midre Cummings Statistics and History - Baseball-Reference.com
- ↑ Mark Teixeira Statistics and History - Baseball-Reference.com
- ↑ Greg Swindell Statistics - Baseball-Reference.com
- ↑ 1998 Seattle Mariners Batting, Pitching, & Fielding Statistics - Baseball-Reference.com
- ↑ Johnson, Lloyd, and Wolff, Miles, ed., The Encyclopedia of Minor League Baseball, 3rd edition. Durham, North Carolina: Baseball America, 2007