According to ProFootballTalk, McGahee had the surgery today and will miss at least a couple of weeks.
This is bad news for the Broncos who are searching for a consistent attack on the ground. McGahee has 456 yards rushing on the year while the two men behind him - Knowshon Moreno and Lance Ball - have each rushed for 54 yards this season. That's 108 yards COMBINED on 32 carries.
That puts more of a load on Tebow to create and with the Detroit Lions coming to town, more pressure on Tebow to create through the air.