In addition to “rookie players” (defined as a person who has never signed a Player Contract with an NFL Club in a prior League Year), the following players may be invited to participate in a Club’s Rookie Football Development Program: (i) non-quarterbacks with zero “Credit Seasons” (as defined in Article 26, Section 2) who signed a Player Contract with any Club for a prior League Year; (ii) quarterbacks with zero “Credited Seasons” (as defined in Article 26, Section 2) who signed a Player Contract with any Club for a prior League Year; and (iii) quarterbacks with one (1) “Credited Season” (as defined in Article 26, Section 2) who participated in less than 25% of their Clubs’ offensive plays during the previous season. Players who participate in the Rookie Football Development Program pursuant to this subsection may only participate in (i) four weeks of the program; (ii) a maximum of four days per week; and (iii) a maximum of three and one half hours on the field with no more than two hours in any single practice on a day in which two practices are held for rookie players. No player shall be permitted to participate in a Rookie Football Development Program more than twice during his NFL career, including his participation in such program as a rookie player. For the sake of clarity and the avoidance of doubt, no player shall be permitted to participate in a Rookie Football Development Program more than once after his rookie year.