Chatwood signed a minor-league contract with the Diamondbacks and was assigned to Triple-A Reno on Tuesday, per the MLB transaction log.
Chatwood made five appearances for Reno in 2023 and registered a 1.69 ERA and 0.78 WHIP with two strikeouts and one walk over 5.1 innings. Chatwood's last major-league appearance was in 2021, when he split time between the Giants and Blue Jays.