"...Wahle's strength has come into question since he tore his labrum in 2006. He'd likely be a better fit for zone blocking...."
Regarding why Wahle can get hired before 29 Feb: PFT: "...Though some readers question why Wahle would be able to sign with anyone prior to February 29, released players with four or more years of credited service whose contracts are terminated in the offseason are automatically eligible to sign with any team. Players with less than four years of service are subject to waivers before becoming free agents...."