Mariota was injured late in the first half when he was sacked, and he was replaced by back-up quarterback Blaine Gabbert.
Gabbert started the second half for the Titans, while Mariota watched from the sideline. The Titans announced Mariota's return as questionable. The story said it's the same injury that forced Mariota to miss time earlier this season.
Ingram will help alleviate some of Kamara's workload in certain situations. Ingram has plenty of experience in New Orleans and makes sense as a backup. He remains a lower RB4 with upside should Kamara miss time.