I've only included HS and JC transfers:

QB James Lark - Played late in senior year (2006)
QB Sam Doman - transferred out (2006)
QB Brenden Gaskins - career backup (2007)
QB Cade Cooper - transferred out (2007)
QB Jason Munns - career backup (2007)
QB Jake Heaps - transferred out (2010)

WR Spencer Hafoka - played sparingly at WR (2005)
WR Luke Ashworth - played a lot (2005)
WR McKay Jacobson - started out strong than regressed (2006)
WR Jordan Smith - career backup (2007)
WR Marcus Mathews - never got on track after fighting through injuries (2007)
WR Ryan Kessman - didn't last very long (2007)
WR O'Neill Chambers - was in and out of the program after showing early promise (2008)
WR Mitch Mathews - appears to be breaking out as a junior (2009)
WR Cody Hoffman - all-time leading receiver (2009)
WR Ross Apo - regressed and injury prone since freshman year (2010)

TE Vic So'oto - ended up at LB (2005)
TE Kyle Leukenga - ended up at DL (2005)
TE Mike Muelhlman - ended up playing as backup DL (2006)
TE Devin Mahina - getting some run as a senior (2007)
TE Kaneakua Friel – most productive TE that Bronco has recruited (2007)
TE Austin Holt - couldn't fight off injuries and scholarship not renewed (2008)
TE Jake Murphy - never made it to campus after his mission (2008)
TE Richard Wilson - career backup (2009)
TE Thomas Bryson - switched to DL and then transferred out (2009)

OL Matt Reynolds - coach's son that started 4 years (2005)
OL Sete Aulai - Was 1st team all MWC as a JC transfer (2005)
OL Braden Hansen - Had solid career at OL (2006)
OL Walter Kahaiali'i - Mostly a backup (2006)
OL Rick Wolfley - moved to DL (2006)
OL Ryan Freeman - Lots of PT as a backup primarily (2006)
OL Famika Anae – career ending injury (2007)
OL Houston Reynolds – career ending injury (2007)
OL Braden Brown - decent career (2007)
OL Levi Mack - transferred out (2007)
OL Eathyn Manumaleuna - became a good DT (2007)
OL Brock Stringham - career ending injury early in senior season (2008)
OL Solomone Kafu - started on and off throughout career (2008)
OL Jess Taufi - academic casualty (2008)
OL Michael Yeck - inconsistent starter and backup (2008)
OL Brad Wilcox - still a sophomore (2009)
OL Tui Crichton - career backup (2009)
OL Terry Alleto - mostly a backup as a junior (2009)
OL Ryan Mulitalo - transferred out (2009)
OL Fono Vakalahi - transferred out (2009)
OL Blair Tushaus - transferred out (2010)
OL Manu Mulitalo - career backup (2010)
OL Tayo - transferred out (2010)
OL Jordan Black - career ending injury (2010)
OL Tuni Kanuch - still a freshman (2010)