- May 8 41st Kentucky Derby: Joe Notter aboard Regret wins in 2:05.4
- May 17 40th Preakness: Douglas Hoffman aboard Rhine Maiden wins in 1:58
- May 17 Cubs George "Zip" Zabel relieves with 2 outs in 1st & winds up with 4-3 19-inning win over Brooklyn in longest relief job ever
- May 31 Indianapolis 500: Italian-born American driver Ralph DePalma accompanied by riding mechanic Louis Fontaine wins from Englishman Dario Resta