By Josh Liebeskind The Astros received much-needed help at the catcher position on Monday when they reinstated Carlos Corporan from the seven-day disabled list. Corporan started behind the plate and hit eighth against the Mariners in Monday’s late game. Corporan, who had been shelved since Aug. 19 with a concussion, recently completed a three-game rehab assignment with Class AA Corpus Christi. Manager Bo Porter said he would keep a close eye on Corporan during Monday’s contest and if a foul tip were to hit his face mask, trainers would immediately talk to the backstop and determine if he should stay in the game. “It’s for precaution because you never know,” [.]