Parnell has not pitched this season after undergoing Tommy John surgery in April 2014. The 30-year-old has made three minor league appearances in at Single A St. Lucie in 2015, but his rehab assignment will be put on hold while he is shut down.
In his last full season in 2013, Parnell had a 2.16 ERA with 44 strikeouts in 50 innings as the Mets closer, saving 22 games. Parnell has been with New York for his entire career since making his MLB debut in 2008.
The Mets are off to a 13-3 start this season and entered Friday's game against the New York Yankees on an 11-game winning streak.
- Molly Geary