He played for the New York Mets, Chicago Cubs, San Diego Padres, Philadelphia Phillies, California Angels, and Milwaukee Brewers during his 10-year major league career.

[1] After a year, Selma was signed as an amateur free agent by the Mets on May 28, 1963, and made his Major League debut two seasons later.

On April 8, 1969, Selma pitched a complete game and threw 12 strikeouts en route to a 2–1 victory, the Padres' first in franchise history.

[5] Selma ended up pitching only four games for the Padres, as he was traded to the Chicago Cubs for Joe Niekro, Gary Ross and Frankie Librán on April 24, 1969.

[4] Selma was traded to the Philadelphia Phillies on November 17, 1969, with Oscar Gamble for a player to be named later (who became Larry Colton) and Johnny Callison.