Robert Joseph Erlin (born October 8, 1990) is an American professional baseball pitcher who is a free agent.

[3] He opened the 2012 season with San Antonio, but strained his elbow and developed tendinitis, making his last start for the team on May 12.

[3][8] Erlin was promoted to the Major Leagues on April 24, 2013,[1][9] and made two appearances in relief before he was optioned back to Tucson on May 2.

[citation needed] Erlin was recalled on June 1 for his first Major League start against the Toronto Blue Jays.

[11] Erlin was promoted for a third stint on June 26 to take the rotation spot of Clayton Richard, who went to the disabled list.

[3] Following the non-tenders of Alexi Amarista and Tyson Ross after the 2016 MLB season, Erlin became the longest tenured Padre.

[citation needed] Erlin returned to the Padres in 2018, making the Opening Day roster as a long reliever out of the bullpen.

[citation needed] On January 29, 2020, Erlin signed a minor league deal with the Pittsburgh Pirates.

[21] On November 30, 2020, Erlin signed a one-year contract with the Hokkaido Nippon-Ham Fighters of Nippon Professional Baseball.

[citation needed] Erlin signed a minor league contract with the Los Angeles Dodgers on February 14, 2022.

[27] Erlin has an average fastball in the 88 to 90 miles per hour (142 to 145 km/h) range, but he is able to contrast it with an outstanding curveball and above-average changeup.