With the end of the Random Game Callbacks (which won't be back next year in this format as it will be too hard for me to get the game stories), I'd share some extraordinarily unimportant facts from the 136 RGCs.
One game went 20 innings with Houston beating San Diego 3-1. The Padres lost in their other RGC appearance in 16 innings.
The longest AL game went 18 innings, a 0-0 tie between Washington and Detroit in 1909.
By dint of being around a long time and my having access to a lot of years of the Chicago Tribune, the Cubs had the most wins in RGCs. They won 12 games. They also lost 9 and had two ties. The Giants won 11 games. The Yankees led AL teams with 10 wins in RGCs.
The Cubs and Giants also led with nine losses. The Senators/Twins franchise led AL teams with eight losses. The Kansas City Royals appeared four times and lost each time. It wasn't a conscious decision, Royals fans.
I did manage to get all of the 30 present franchises covered, although the Brewers only showed up in their AL version. And they lost.
The Rangers and Blue Jays both went 3-0. The only undefeated existing NL team was Montreal/Washington which won in its only appearance on April 23, 1982.