Boston Celtics rookie forward Daniel Theis is expected to miss the remainder of the season after tearing his left meniscus, coach Brad Stevens said Monday. Theis suffered the injury on a knee-to-knee collision in the final moments of Sunday's loss to the Indiana Pacers. It's the latest hit for a Celtics team battling a rash of injuries. "When he got buckled back [against Oladipo], I guess he tore a meniscus. So he is out for the foreseeable future. Most likely out all season," said Stevens. "It's too bad. He's had an incredible rookie year. He's obviously down and he's weighing surgical options right now and we'll go from there." The Celtics played the second half of Sunday's game without four of their five opening-night starters after Kyrie Irving was forced out due to knee soreness. Irving is expected to sit out an extended stretch to combat lingering soreness, while both Al Horford (illness) and Jaylen Brown (concussion) are...