Andrew Bynum had the fluid drained from his injured right knee Monday, and less than a day later some of the fluid had returned. It was not unexpected, but it was hoped that the procedure would reduce the swelling and enable him to play with more mobility during the NBA Finals. Game 1 is Thursday night at Staples Center. Bynum participated in some, but not all of Wednesday’s practice. “I just did the fastbreak stuff today,” he said. “It felt all right. I didn’t do the half-court scrimmage. … We were just kind of hoping it wouldn’t (return),, so it would feel better. I’m used to it. I’m used to playing with it. It’s not any bigger than before, so I’m just going to go out and play.” Bynum has torn meniscus in his right knee.