Havenstein (ankle) doesn't carry an injury designation into Sunday's game against the Cardinals and is expected to play, Gary Klein of the Los Angeles Times reports.
It will be Havenstein's season debut after he missed Week 1 versus Detroit. His return is huge for a Rams offensive line that lost interior lineman Steve Avila to a sprained MCL in the season opener and is still without starting LT Alaric Jackson, who is serving the final game of his two-game suspension this week.