Steelers coach Mike Tomlin thought his offense got in its own way during the first half of Sunday night’s game against the Cowboys. With Pittsburgh trailing 6-3 at halftime, Tomlin had a humorous way of putting it while speaking to NBC’s Melissa Stark. “We’ve gotta stop kicking our own butt,” the coach said. “No disrespect to the Cowboys, but one of those drives got stalled by two pre-snap penalties. We had a fumble that killed us in field position in another series. If we stop kicking our own butt, we can start focusing on theirs.” CLICK HERE to go to PrizePicks and use code ON3 to receive a …