Avila will retire at the end of the regular season, Maria Torres of The Athletic reports.
Avila is hitting .179/.347/.333 in his 13th and supposedly final season. He caught for the Tigers from 2009 to 2015 and has since spent time with five other clubs. The 34-year-old, who will become a free agent when the season ends, is a career .233 hitter with 105 home runs.