Delcarmen, 29, asked for and was granted his release by the Seattle Mariners on May 31 after going 2-2 with a 5.14 ERA in 18 games for Triple-A Tacoma. That condition was part of his contract signed in February.
He was a second-round pick by the Boston Red Sox in 2000 and was 11-6 with a 3.89 ERA and three saves in 289 relief appearances for Boston from 2005 to 2010. He has had at least 55 appearances at the big league level in each of the past three seasons. He has 11 postsesaon appearances in his career, including six during Boston's World Series run in 2007.
Richard Durrett covers the Rangers for ESPNDallas.com.