Mitchell reverted to the Cowboys' practice squad Monday, per the NFL's official transaction log.
Mitchell failed to record any stats while playing 10 offensive snaps and 11 snaps with the special-teams unit after being elevated for the second straight week prior to Sunday's 27-23 win over Indianapolis. With fellow tight end Jake Ferguson (knee) expected to miss multiple weeks, there's a good chance Mitchell is elevated again in Week 10 versus the 49ers.