It was because he started slowing down, then the fielder bobbled it, and then he sped up (but way too late). There's a 99.9999% chance he's out by a few steps either way, but he was booed for the optics of the effort
Cubs will lose 1-0. Boyd will pitch 8 IP of scoreless ball. Palencia comes in, and the Brewers score on a catcher's interference, wild pitch, and two consecutive balks.
That's how they've played since May. Every single dribbler and check swing finds holes and the opposing team makes inexplicably bad decisions, etc. Everything that can go right for them has, every inning. You walk the leadoff man or make an error? the Brewers WILL pay off on it.