ORCHARD PARK, N.Y. — Quarterback Tyrod Taylor understood there would be changes at the receiver position when he elected to return to Buffalo for a third season by restructuring his contract in March. Little did he anticipate how drastic the transformation would be following Anquan Boldin’s abrupt decision to retire Sunday, which came on the heels of Sammy Watkins being traded to the Los Angeles Rams. “It’s definitely big,” Taylor said following practice Tuesday.