SAN FRANCISCO – Confusion rang across the Chase Center press conference room at Warriors Media Day when Pat Spencer nonchalantly walked to the podium and sat down in his No. 61 jersey with a black short-sleeve undershirt. Why? Because he wasn’t even officially on the roster at the moment. Spencer’s odd arrival felt like a comical breath of fresh air from what was a Warriors offseason that felt mostly bizarre. The Warriors announced shortly after that they had re-signed Spencer to a two-way contract. Spencer proved the previous two seasons that he’s a step above the Warriors’ G League affiliate in Santa Cruz. The Warriors converted his two-way contract to a standard contract at the end of last season for the playoffs, and then he waited all offseason without ever putting pen to paper. He finally did on Sept. 29, but Spencer again didn’t begin the season on the Warriors’ 15-man roster. “Pat’s an NBA player,” Steve Kerr said Tuesday night after the Warriors’ 124-112 loss to the Oklahoma City Thunder. “He belongs on our roster full-time.” Without a doubt, Spencer agrees, but he...