How Cubs’ Marcus Stroman is tapping into the best version of himself as a pitcher

Cubs right-hander Marcus Stroman held the Marlins to three runs in six innings on Wednesday.MIAMI – Marcus Stroman’s sinker caught the inside edge of the strike zone and splintered Marlins leadoff hitter Jon Berti’s bat as he tried to battle it off.

After a first-pitch slider, Stroman had thrown Berti five straight sinkers to induce an inning-ending groundout in the third. Berti threw down his helmet as he ran through first base.

“I’ve put together a pretty decent second half, and I’ve thrown the ball really well, and getting back to who I am as a pitcher,” Stroman said in a recent conversation with the Sun-Times. “And now, we’re starting to find how to adapt to make my starts even better.…