The 1989-90 T/M Senior League set contains 120 standard-size cards depicting members of the Senior League. The fronts are borderless, with full color photos and black bands at the bottom with player names and positions. The vertically oriented backs are gray and red, and show career major league totals and highlights. The cards were distributed as a boxed set with a checklist card and eight card-sized puzzle pieces. The set ordering is essentially alphabetical according to the player's name.