Birrer also gave five seasons of good service in the Venezuelan League, while pitching for four teams, and starring in the Caribbean Series.
He went 30–34 with a 2.87 ERA in 84 games, including 40 complete games, 114 walks, and 282 strikeouts in 5662⁄3 innings. In addition, he posted the best ERA in the league during the 1959–1960 (1.89) and 1960–1961 (1.64) seasons.[5]
Birrer then made the 1959 Caribbean Series All-Star team, after going 2–0 with a 1.25 ERA and 18 strikeouts in 212⁄3 innings, including a 13-inning victory. He also set a Series record with his 13 innings pitched in a single game, which still remain intact.[6]
Birrer spent the last years of his life at a nursing home in Clarence, New York, where he died in 2013 at the age of 84.[4][7]