Newman replaced Ketel Marte (back) at second base after Marte was removed in the eighth inning from Friday's 10-8 loss to San Diego.
Newman entered as a pinch hitter earlier and stayed in the game at DH before taking over for Marte, who has been nursing a sore back. Marte told manager Torey Lovullo that he was unable to hit, per Steve Gilbert of MLB.com. Marte is day-to-day, which means Newman will be at the ready to take over at second base for as long as needed.