Spain signed his restricted free agent tender Tuesday, Cameron Wolfe of ESPN.com reports.
Spain will remain in Tennessee after starting 33 games at left guard for the Titans over the past three seasons. The Titans also added Xavier Su'a-Filo and Kevin Pamphile this offseason, which will likely lead to training camp battle for the starting left guard position come August.
Spain (back) doesn't appear on the injury report ahead of Saturday's game against the Patriots.
Spain has been dealing with a minor back injury since Week 17 and was held out of Wednesday's practice as a precaution. However, he returned in full fashion Thursday and is fully on track to play Saturday.
Spain was considered questionable due to a back issue heading into the weekend, but will play through any remaining discomfort. Corey Levin would likely fill in at left guard should he ultimately suffer a setback.
Spain missed two games earlier in the season due to a turf toe injury but has started in every other contest. Look for more updates to come Saturday during warm ups, with Corey Levin serving as the likely replacement should Spain be ruled out.
Spain (toe) was a full participant in Wednesday's practice.
Spain practiced in full all week and appears ready to suit up for Thursday's matchup with the Steelers.