TORONTO — Maybe this is little more than Hyun-Jin Ryu feeling the effects of a shortened spring training, the by-product of a pitcher force-fed into the regular season while still in build-up mode. That’s certainly a plausible hypothesis for his lack of crispness and the forearm soreness revealed Saturday after he had a noticeable dip in velocity. If ever there was a time to be on guard for small sample size randomness, well this April is it. The thing is, once you factor in the veteran left-hander’s final 10 starts of 2021 — 46 innings, 38 runs, 10 homers and a boffo .296/.342/.524 opposition batting line — there’s reason to wonder if this is more trend than blip. Whether they need to address the former or ride out the latter is an important question for the Toronto Blue Jays , who erased an early deficit left by Ryu but fell 7-5 to the Oakland Athletics on Christian Pache’s two-run homer in the ninth off Julian Merryweather . “Of course I’m concerned,” manager Charlie Montoyo s...