Ehrhoff (concussion) took contact in Friday's practice, Seth Rorabaugh of the Pittsburgh Post-Gazette reports.Ehrhoff looks to be nearing the finish line in his recovery from the concussion, as taking full contact represents one of the final hurdles he'll have to clear. Coach Mike Johnston has ruled out a return to action Saturday against the Blues for the blueliner, but he could be ready to go for the second half of the Pens' back-to-back Sunday versus the Panthers.