Agricultural baler comprising: - a bale case, having a wall portion with an entrance opening for the introduction of crop material; - a plunger, disposed for movement in the bale case to thereby compact said crop material into bales; - a duct for the transportation of said crop material to said entrance opening; - a stuffer unit (36, 136, 236), operably associated with said duct and comprising: - a fork assembly comprising tines; - a drive mechanism acting on the fork assembly; and - a clutch arrangement for selective coupling the drive mechanism to a power source of the agricultural baler, said clutch arrangement comprising: - a selectively operable dog clutch (77, 99, 107) comprising a driving clutch member and a driven clutch member that are arranged for rotation about a shared axis of rotation (r), wherein the driving clutch member and the driven clutch member are configured for selectively engaging each other in one direction of rotation of the driving clutch member relative to the driven clutch member; and characterized by - an overrunning clutch associated with the driving clutch member and the driven clutch member, that is configured for engaging in the opposite direction of rotation of the driving clutch member relative to the driven clutch member. - a bale case, having a wall portion with an entrance opening for the introduction of crop material; - a plunger, disposed for movement in the bale case to thereby compact said crop material into bales; - a duct for the transportation of said crop material to said entrance opening; - a stuffer unit (36, 136, 236), operably associated with said duct and comprising: - a fork assembly comprising tines; - a drive mechanism acting on the fork assembly; and - a clutch arrangement for selective coupling the drive mechanism to a power source of the agricultural baler, said clutch arrangement comprising: - a selectively operable dog clutch (77, 99, 107) comprising a driving clutch member and a driven clutch member that are arranged for rotation about a shared axis of rotation (r), wherein the driving clutch member and the driven clutch member are configured for selectively engaging each other in one direction of rotation of the driving clutch member relative to the driven clutch member; and characterized by - an overrunning clutch associated with the driving clutch member and the driven clutch member, that is configured for engaging in the opposite direction of rotation of the driving clutch member relative to the driven clutch member. - a fork assembly comprising tines; - a drive mechanism acting on the fork assembly; and - a clutch arrangement for selective coupling the drive mechanism to a power source of the agricultural baler, said clutch arrangement comprising: - a selectively operable dog clutch (77, 99, 107) comprising a driving clutch member and a driven clutch member that are arranged for rotation about a shared axis of rotation (r), wherein the driving clutch member and the driven clutch member are configured for selectively engaging each other in one direction of rotation of the driving clutch member relative to the driven clutch member; and characterized by - an overrunning clutch associated with the driving clutch member and the driven clutch member, that is configured for engaging in the opposite direction of rotation of the driving clutch member relative to the driven clutch member. - a selectively operable dog clutch (77, 99, 107) comprising a driving clutch member and a driven clutch member that are arranged for rotation about a shared axis of rotation (r), wherein the driving clutch member and the driven clutch member are configured for selectively engaging each other in one direction of rotation of the driving clutch member relative to the driven clutch member; and characterized by - an overrunning clutch associated with the driving clutch member and the driven clutch member, that is configured for engaging in the opposite direction of rotation of the driving clutch member relative to the driven clutch member.