Thompson-Robinson is still in the concussion protocol and was a limited participant Personal writer Rookie QB Dorian Thompson-Robinson entered practice Wednesday for the first time since he suffered a concussion in Week 12 as a limited participant. Thompson-Robinson remains in the concussion protocol but has continued to make progress since suffering a concussion late in the third quarter against the Broncos in Week 12. He did not participate in practice all week when the Browns were in Los Angeles and he didn’t play. in Week 13 against the Rams. Veteran QB Joe Flacco – who had been signed to the…