Hopefully someone will have sports memorabilia as valuable as this baseball signed by Cal Ripken Jr. (MARK FINKENSTAEDT/FTWP)

The show — from Leftfield Pictures, the same New York-based production company behind History’s “Pawn Stars” — will chronicle the daily adventures of the staff at Timonium sports memorabilia store Robbie’s 1st Base, ABC announced Thursday. A dozen half-hour episodes have been ordered.

Each week, we’ll see staffers Robbie Sr. and Jr. — along with sidekicks Sweet Lou and Shaggy — as they negotiate, buy and sell various sports merchandise, both at the store and other locations. Plus, appearances from athletes such as Jim Brown and Pete Rose, who visit for some banter and “smack talk.”

And look for a Baltimore Orioles shout-out in the first episode — a customer is convinced that a baseball caught over right fielder Nick Markakis’s glove is worth lots of money, though Robbie Sr. has different ideas.

“Ball Boys” debuts Saturday, March 24 at 3 p.m. with two half-hour episodes.