Luke Grimm went undrafted in the spring. He was one of many undrafted free agents to sign with the Los Angeles Chargers after the draft. He had high hopes of getting a chance to shine. Grimm has been fighting for reps and knows special teams could be wear he makes his case. He certainly helped himself Saturday night as he returned a Los Angeles Rams’ punt 66 yards for a touchdown. Ethan Evans appeared to have out kicked his coverage and Grimm beat the gunners to the edge and scored a difficult touchdown. MORE : Jim Harbaugh reveals unprecedented preseason plan for Chargers QB Justin Herbert Daniel Popper of The Athletic said Grimm had a big moment during a recent Chargers practice. “Rookie receiver