The Angels hope to insert Garrett Richards into their rotation this season, but they are up against time. Eight weeks remain in this season, and Richards should require roughly six weeks to ramp up his pitching. Any setback, and he’ll run out of wiggle room. After three weeks of playing catch from increasing distances, Richards visited a team physician late Thursday, who cleared the right-hander to throw off of a mound Friday. It will be Richards’ first time pitching since April 5, and it will start the unofficial six-week timeline. If Richards pitched out of the bullpen, he could conceivably return sooner. But the Angels are not considering that option.