The first impression right-hander Erik Johnson made on White Sox pitching coach Don Cooper in 2013 was a good one. Left-hander Scott Snodgress showed Cooper something, too.

It’s early, and both have more steps to take and consistency to gain, but the Sox’ top two pitching prospects suggested they could be with the big-league club sooner rather than later with what they showcased Sunday against the Los Angeles Dodgers.