July 31, 2004
After playing with the Twins in an 8-2 loss against the Red Sox on the previous day, Doug Mientkiewicz changed clubhouses and uniforms to suit up for his new team. He was traded to the Red Sox in a deal that, among other things, sent Nomar Garciaparra to the Cubs. The Twins got a minor league pitcher in the deal, but more importantly cleared the starting first base job for Justin Morneau.
July 30, 2001
The Twins, pushing for their first postseason appearance in a decade, attempt to sure up their pitching staff be trading Matt Lawton to the Mets in exchange for Rick Reed. Reed struggled through the final few months of 2001 and the Twins missed the playoffs, but he was a key member of the rotation when the Twins finally did win the division in 2002. Reed’s name didn’t appear on the official Division Championship merchandise, however, because he was not a member of the player’s union due to his participation as a replacement player in the spring of 1995.
July 31, 1998
In full salary dump mode, the Twins send Greg Swindell and Orlando Merced to the Red Sox in exchange for Matt Kinney, Joe Thomas, and John Barnes. Kinney was the most successful of the trio that the Twins received in the deal, starting 20 games for the Twins spread in between the 2000 and 2002 seasons before being traded to the Brewers at the end of the 2002 season. Barnes played in 20 games as in outfielder from 2000-2001, and Joe Thomas has yet to see any major league action.
July 31, 1995
Once again in salary dump mode, the Twins send two members of the 1991 championship pitching staff to the Dodgers. Both Kevin Tapani and Mark Guthrie had spent the vast majority of their careers in a Twins uniform, but would be putting on Dodger blue for the time being. The most notable acquisition for the Twins was Ron Coomer, who went on to represent the Twins in an All Star game. The Twins also got Craig Hansell, Jose Parra, and Chris Latham in the deal.
July 31, 1989
The 1988 Cy Young award winner and one of the keys to the 1987 World Series win, Frank Viola, was shipped to the Mets in a deal that helped lay the foundation for the pitching staff that would ultimately win the 1991 World Series. The Twins acquired Kevin Tapani, Rick Aguilera, and David West; all major contributors to the 1991 pitching staff. Tim Drummond and Jack Savage also came in the deal.
July 30, 1987
The Twins acquired future Hall of Famer Steve Carlton from the Indians in exchange for a player to be named later. Unfortunately for the Twins, his days playing like a Hall of Famer were well behind him, as Carlton had a 6.70 ERA in nine appearances with the Twins that season. Carlton retired after he was released by the Twins in April of 1988. The ptbnl turned out to be Jeff Perry, who has no major league statistics.
Born July 31, 1881
Unglaub was a utility player who joined Washington in the middle of the 1908 season. He had a reputation as a clutch hitter, and seemed to be generally well liked by fans. He was a decent defender, and played mostly first base during his time in Washington, Unglaub was sold to Lincoln, NE after the 1910 season and became a player/manager there. Unglaub had an engineering degree from the University of Maryland, and used it in the off season working for various railroad shops in Baltimore. It was there that he was tragically killed in an accident in November 1916. Here is a full bio.