CHICAGO -- The baseball that Owen Caissie launched over the left-center gap on Tuesday afternoon hit the bleachers and ricocheted back into the outfield. By the time the Cubs rookie was receiving high fives and helmet slaps in the home dugout, the ball had been relayed in for safe keeping.

Kyle Tucker received the baseball and carried it through the dugout to deliver to a nearby authenticator. That was fitting, as Caissie’s first career blast in the big leagues came on a day he filled in for Tucker as Chicago’s right fielder. And the big prospect helped power the Cubs’ 6-4 win over the rival Brewers in Game 1 of the day’s doubleheader.

Caissie not only hammered his solo shot -- one that rocketed off the bat at 105.2 mph -- off Brewers righty Shelby Miller but also delivered a two-run

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