Potomac Cannons is on point tonight. I think if Desmond puts together a solid season, he's the guy joining Zimmerman for years to come on that left side.
It's still too early to worry about Espinosa. This is a huge year for him, Marrero, Burgess and the other "Last of the Bowdenians".
IMO, if Desmond takes advantage of the opportunity, Espinosa will battle Kobernus (who is just beginning his professional career) for our 2nd baseman of the future (for the time being).