Cubs’ growing pitching staff keeping Kyle Hendricks on his toes

Cubs starter Kyle Hendricks threw two innings during a spring training split squad game at Sloan Park in Mesa, Arizona.MESA, Ariz. – A media scrum grew in front of David Robertson’s locker Thursday morning. Robert Gsellman appeared in the clubhouse. The Cubs made Chris Martin’s one-year deal official. All around were signs that the Cubs’ pitching staff was taking shape.

As reports and rumors continued to pop up Thursday during the Cubs’ first spring training contests, a pair of seven-inning split squad games against the White Sox, it was also clear that there was plenty for the Cubs to still figure out.

“I feel like I’ve met everybody, and then I show up the next day and there’s somebody…