5 in-house options to replace Alex Mack

Photo by Christian Petersen/Getty ImagesWith the news of Alex Mack’s retirement made official on Thursday, the 49ers now have a major hole to fill on the interior of their offensive line. Here are five options on the roster that might potentially fill the void left by Mack’s departure.

1. Jake Brendel

As of right now, Brendel is number one on the depth chart at the position. Obviously, that can change over the next couple of months of offseason activity, but Brendel does appear to be the front runner for the job at this current moment.

Brendel does have a year of experience in the 49ers system, which is certainly a plus considering his familiarity with Kyle Shanahan’s offensive scheme. The…