It appears Daniel Theis’ “indefinite” absence will be shorter than expected. Boston Celtics president of basketball operations Danny Ainge provided a positive update Thursday morning on the veteran big man, who suffered a torn plantar fascia Saturday night against the Detroit Pistons. “We got good news from Daniel this week,” Ainge said during his weekly interview with 98.5 The Sports Hub’s “Toucher & Rich.” “It looks like it will be a few weeks as opposed to six or eight weeks. So, it’s not maybe quite as bad as initially thought.” Theis said earlier this week he expects to be in a walking boot for two weeks then ... NESN.com