SANTA CLARA, Calif. – The roster causality of the San Francisco 49ers activating standout receiver Michael Crabtree to the 53-man is No. 3 quarterback McLeod-Bethel Thompson.Thus, it continues the merry-go round at the poison behind starter Colin Kaepernick. Bethel-Thompson's release is not a shock. The 49ers' roster is deep and he was the logical player to get cut. He is eligible for the practice squad and the 49ers could place him there if he clears waivers Wednesday.