Games in 1991

• June 16, 1991 - Reds at Phillies
• June 19, 1991 - Twins at Orioles
• June 23, 1991 - Cubs at Giants

Reds at Phillies - June 16, 1991

June 16, 1991 - Reds at Phillies, the first game in which both teams wear throwback jerseys. The Reds wore throwback to their 1957-1960 Road Vest. The Phillies wore 1957 Home Pinstripe jerseys.
Notable players in this game are Barry Larkin (HR), Eric Davis, Chris Sabo, John Kruk, Dale Murphy, Norm Charlton (as a starter) and Randy Myers.

Twins at Orioles - June 19, 1991

June 19, 1991 - Twins at Orioles. Orioles throwback to 1966 to honor the 25th anniversary of their World Champion team. The Twins wore their present day Road Jersey.

Notable players in throwbacks in this game - Cal Ripken Jr and Brady Anderson.

Cubs at Giants - June 23, 1991

June 23, 1991 - Cubs at Giants. The Giants throwback to 1925 with the National League Golden Jubilee patch on the front.  

Notable players in throwbacks in this game - Will Clark and Matt Williams

These cards definitely have a couple of the most entertaining shots to appear on cards. Matt Williams with this Babe Ruth imitation, Mike Benjamin wondering how the heck they used the small gloves to field and Roger Craig reminiscing about seeing the originals in person.  
We get 3 different companies offering us basically the same card of Mike Felder