Theis (neck) has been ruled out for Saturday's game against the Thunder, Erin Summers of the Gulf Coast Sports & Entertainment Network reports.
Theis will be sidelined for a second straight game due to neck spasms, and he could be in jeopardy of missing a third on the second leg of the Pelicans' back-to-back against the Spurs on Sunday. Jeremiah Robinson-Earl will be New Orleans' main backup center to Yves Missi on Saturday, though Trey Jemison could also see some playing time due to Theis' injury.