A draper platform for mounting on a feederhouse of an agricultural combine, comprising: a frame that is elongate extending generally perpendicularly to a direction of operational travel of the draper platform and generally parallel to the ground; an elongate reciprocating knife assembly that extends laterally across substantially an entire transverse extent of the draper platform, wherein said elongate reciprocating knife assembly is disposed at a forward edge of the draper platform, a left side endless belt conveyor disposed behind the reciprocating knife assembly on the left side of the draper platform to convey cut crop material severed by the elongate reciprocating knife assembly at the left side of the draper platform laterally inwardly toward the middle of the draper platform; a right side endless belt conveyor disposed behind the elongate reciprocating knife assembly on the right side of the draper platform to convey cut crop material severed by the elongate reciprocating knife assembly at the right side of the draper platform laterally inwardly toward the middle of the draper platform, a center endless belt conveyor disposed to receive cut crop material from the left side endless belt conveyor and the right side endless belt conveyor and to carry the cut crop material rearward towards a central rear aperture in the frame through which crop can be fed into the feederhouse; and a conveyor drum with a rotational axis extending generally perpendicularly to the direction of operational travel of the draper platform, the conveyor drum mounted above and in front of the central rear aperture; characterized by a left side conveyor member (150, 164) located at a crop transition zone between the left side endless belt conveyor and the conveyor drum and by a right side conveyor member located at a crop transition zone between the right side endless belt conveyor and the conveyor drum, the left side conveyor member (150, 164) and the right side conveyor member (152, 165) being rotatably supported around a rotational axis that is substantially vertical. a frame that is elongate extending generally perpendicularly to a direction of operational travel of the draper platform and generally parallel to the ground; an elongate reciprocating knife assembly that extends laterally across substantially an entire transverse extent of the draper platform, wherein said elongate reciprocating knife assembly is disposed at a forward edge of the draper platform, a left side endless belt conveyor disposed behind the reciprocating knife assembly on the left side of the draper platform to convey cut crop material severed by the elongate reciprocating knife assembly at the left side of the draper platform laterally inwardly toward the middle of the draper platform; a right side endless belt conveyor disposed behind the elongate reciprocating knife assembly on the right side of the draper platform to convey cut crop material severed by the elongate reciprocating knife assembly at the right side of the draper platform laterally inwardly toward the middle of the draper platform, a center endless belt conveyor disposed to receive cut crop material from the left side endless belt conveyor and the right side endless belt conveyor and to carry the cut crop material rearward towards a central rear aperture in the frame through which crop can be fed into the feederhouse; and a conveyor drum with a rotational axis extending generally perpendicularly to the direction of operational travel of the draper platform, the conveyor drum mounted above and in front of the central rear aperture; characterized by a left side conveyor member (150, 164) located at a crop transition zone between the left side endless belt conveyor and the conveyor drum and by a right side conveyor member located at a crop transition zone between the right side endless belt conveyor and the conveyor drum, the left side conveyor member (150, 164) and the right side conveyor member (152, 165) being rotatably supported around a rotational axis that is substantially vertical.