A pickup assembly for an agricultural vehicle includes: a rotatable reel; a plurality of tine bars coupled to the reel such that rotation of the reel moves the tine bars through a movement path; at least one tine carried by each of the tine bars; and at least one tine support guide carried by at least one of the tine bars. The at least one tine support guide includes at least one slot that allows deflection of the deflectable section of a tine in a first direction and limits deflection of the deflectable section in a second direction that is opposite the first direction.