Well I pulled a 3 1/2 lb chunk of eye round out of the freezer the other day. Slow defrost, basic rub, beefy injection, and let sit overnight in refer.
Into the smoker at 250 deg for a couple hours, with the ThermoProbe in place. Nice steady rise in temp, all good. Pulled it at about 138 deg and covered while laying out the veggies. Went to cut it and knew something was wrong. Light bark was good, internal color was perfect med rare, meat had good flavor, but was TOUGH. Was expecting much better, quite disappointing.