Dennis Ryan Tepera was born on November 3, 1987, and is an American professional baseball pitcher for the Los Angeles Angels of Major League Baseball.
He has previously played for the Toronto Blue Jays, Chicago Cubs, and Chicago White Sox. After graduating from Brazoswood High School in Texas, he played college baseball for the Sam Houston State Bearkats.
The Blue Jays selected Tepera in the 19th round of the 2009 Major League Baseball draft. He was assigned to the Blue Jays of the Gulf Coast League, where he appeared in 11 games, five of which he started. Tepera had a 3–1 record, a 1.72 ERA, and 42 strikeouts in 362/3 innings.
In 2010, he was promoted to the Class-A Lansing Lugnuts, and pitched 120 innings over 24 appearances (22 starts). In total, Tepera earned a 9–6 record, 3.98 ERA, and 79 strikeouts. He played the 2011 season with the Advanced-A Dunedin Blue Jays, posting an 11–6 record, 4.43 ERA, and 93 strikeouts in a career-high 1461⁄3 innings.
On March 19, 2022, Tepera signed a 2-year, $14M contract with the Los Angeles Angels. He made his Angels debut on April 7, 2022, against the Houston Astros, pitching one inning but surrendering consecutive solo home runs to Alex Bregman and Yordan Álvarez.
On April 11, 2022, he struck out the side in the 8th inning in a 6–2 win over the Marlins. On April 20, Tepera pitched 2.0 perfect innings in a combined 1-hit 1-walk shutout in relief of starting pitcher Shohei Ohtani.
Ryan has never divulged any information about his parents, he is a very private person who likes to keep his personal life away from media attention.