The Orioles have revealed their list of non-roster invitees to spring training, and it includes two new middle infielders and a catcher who wasn't in the original group.
Johnny Giavotella and Robert Andino will report to the Ed Smith Stadium complex in Sarasota, as previously reported. They'll be joined by catcher Yermin Mercedes, who replaces the injured Austin Wynns.
Wynns is recovering from an ankle injury suffered while playing for Tigres del Licey in the Dominican Winter League.
Here's the full list, which contains 12 players and could be expanded if the Orioles make any more moves:
Pitchers
 RHP Nate Adcock 
 LHP Jed Bradley
 RHP Richard RodrÃguez
 RHP Zach Stewart
 
 Catchers
 YermÃn Mercedes
 Audry Pérez
 Chance Sisco
 
 Infielders
 Robert Andino 
 Johnny Giavotella
 
 Outfielders
 Chris Dickerson
 Logan Schafer
 David Washington
Pitchers and catchers report to spring training on Monday, with the first full-squad workout held on Feb. 17.
Mercedes, who turns 24 on Valentine's Day, batted .353/.411/.579 with 25 doubles, five triples, 14 home runs and 60 RBIs in 91 games at low Single-A Delmarva and .318/.381/.542 with six doubles, six home runs and 17 RBIs in 31 games at Single-A Frederick. He won the South Atlantic League batting title.
For you numbers freaks, Rule 5 outfielders Aneury Tavarez and Anthony Santander will wear 57 and 54, respectively. Adcock is wearing 52, Bradley 73, Stewart 50, Rodriguez 70, Mercedes 75, Perez 76, Sisco 74, Dickerson 18, Giavotella 16, Schafer 28 and Washington 72. Andino apparently hasn't been assigned a number at this time.