In continuing my research about the identity of the beloved disciple, I came across posts by Michael Barber and Philip J. Long defending the traditional identification of the beloved disciple with the Apostle John. The cases outlined are similar to what was advanced by scholars such as Westcott and Köstenberger (and many other commentators). Of course, these posts were from 2007 and 2012 so one would have to ask them whether they hold the same position today.
Other Bibliobloggers Defend John as the Beloved Disciple