After not lacking a single spot in his warmup Sunday, Cubs right-hander Tyler Chatwood’s first pitch went previous catcher Willson Contreras and hit the brick wall behind house plate. Then he threw three extra balls to stroll the primary batter he confronted. Boos got here from the followers at Wrigley Field, and the all-too-familiar begin was sufficient to have many considering, ‘‘Here we go again.’’ But then one thing clicked. One day after right-hander Yu Darvish gave up two house runs within the Cubs’ first loss in per week, Chatwood received them again on monitor heading into their time off Monday. He allowed just one extra stroll and pitched six scorelessinnings in his first begin of the season.