Mahaffey pitched in two of the games as part of the losing streak, losing a 1–0 game (the first of that losing streak) on a steal of home by Chico Ruiz of the Cincinnati Reds, and was taken out while winning in a game against the Braves in which Rico Carty hit a triple off of reliever Bobby Shantz to win the game.
In the 1964–1965 off-season, as the country reeled between rapid governmental transitions and militarism, he undertook a trip with Catholic Relief Services to his home country, on a mission to deliver clothing and supplies.
Puerto Rico | Mayagüez, Puerto Rico | University of Puerto Rico | Santurce, San Juan, Puerto Rico | Supreme Court of Puerto Rico | Ponce, Puerto Rico | Río Piedras, Puerto Rico | Governor of Puerto Rico | University of Puerto Rico at Mayagüez | Rico | Naguabo, Puerto Rico | Puerto Rico Highway 1 | Puerto Rico Government Development Bank | House of Representatives of Puerto Rico | New Progressive Party of Puerto Rico | Caguas, Puerto Rico | Rico Dredd | Puerto Rico Department of Justice | Miss Puerto Rico | Judge Rico | Fajardo, Puerto Rico | Culebra, Puerto Rico | Club Atletico River Plate Puerto Rico | Utuado, Puerto Rico | Sevilla FC Puerto Rico | Río Grande, Puerto Rico | Rico Yan | Rico Saccani | Rico Fata | Rico Blanco |
Managed by Buck Rodgers, the team received strong support from Series MVP Rico Carty, who led the hitters in runs (8) and RBI (10), while setting a new Series record with five home runs.