Mateo was held out of the lineup for Wednesday's game against the Mariners while he nurses a jammed thumb, Lindsay Crosby of BravesToday.com reports.
The injury looks to be minor, but it was enough that Atlanta felt compelled to call up Jim Jarvis from Triple-A Gwinnett to make his MLB debut at shortstop Wednesday. Atlanta is idle Thursday, so Mateo will receive at least a couple days of rest. Mateo had started six straight games before being left out of the lineup Wednesday.