Alvarez has not played for Triple-A Gwinnett since Aug. 14 while battling pneumonia, Mark Bowman of MLB.com reports.
If healthy, Alvarez would have been a candidate to get a call-up to Atlanta and see time at third base while Austin Riley (hand) is sidelined. However, he's currently unavailable due to the illness, and it's not clear when Alvarez will be ready to play again for Gwinnett. Alvarez went just 3-for-30 with a 10:0 K:BB over eight games in an earlier stint with the big club in July.