The two will be playing in the brown and gold along with acting as line coaches and undertaking part-time development coaching roles for the AFL side.
Box Hill’s GM-Football Dan Napoli has spoken of the exciting opportunities the two present for next season.
“To attract and sign two guys that offer great leadership and experience to our line up is a fantastic coup for the club,” Napoli told the club’s website.
“It’s pleasing to be able to inject some top end talent into our list heading into the 2020.
“We’ve got a young and exciting group who should really benefit from the knowledge and insight both Brett and Andy can offer.
“We’re looking forward to seeing what they’ll bring in both and on-field and off-field capacity.”
Deledio retired in 2019 after an incredible 15-year career. The No.1 pick in the 2004 draft achieved two All Australian selections and two best and fairest awards. He acted as a development coach for the Giants’ AFLW team in 2019.
Otten enjoyed a 12-year career with the Crows despite suffering a bad run with two knee reconstructions and acted as a mentor for many of Adelaide’s youngsters in the last couple of seasons.