Toronto catcher John Buck will be on the disabled list for 15 days with power-hitting J.P. Arencibia, the heir apparent to Buck?s job next season, is being called up from triple-A Las Vegas. Arencibia was a first-round pick in the 2007 June draft. Through 95 games with Las Vegas, Arencibia has hit .303 with 31 home runs, 32 doubles, 71 runs scored and 79 RBIs.