Colt Emerson’s latest home run did not erase every early-season concern, but it gave the Mariners the kind of evidence they needed. After a wrist issue raised fair questions about his power and timing, Emerson’s fourth homer of the season for Triple-A Tacoma was a much-needed sign that his bat is starting to look healthy again. Emerson jumped a first-pitch inside slider and sent it 103.8 mph off the bat and 375 feet to right field. For a young left-handed hitter coming off a wrist concern, the quality of that contact mattered just as much as the result. Wrist injuries can be sneaky power thieves. They mess with timing, bat speed, confidence, and all the things that separate a routine fly ball from a ball that leaves the yard. So when Emerson turns on something inside and hits it that hard to the pull side, we can absolutely acknowledge that it looked like a top prospect starting to look like himself again. COLT! CRUSHED!…