Roberto Andrew “Rob” Sidoli (born 21 June 1979), also known as Robert Sidoli, is a former Welsh international rugby union player. He has won 42 caps for Wales as a lock forward.
Born in Merthyr Tydfil, he played for his school, Bishop Hedley High School, and then club rugby for Merthyr and Pontypridd, being voted Pontypridd’s Player of the Year in 2001–02. During his time at Merthyr, Sidoli studied for a BSc in computer science at Cardiff University. At the introduction of regional rugby in Wales in 2003, Sidoli joined the Celtic Warriors, but the team only lasted a year before being wound up in 2004, when Sidoli joined the Cardiff Blues.
Sidoli joined Bristol at the start of the 2008–09 season, but was unable to prevent them from being relegated, and returned to Wales in 2009, joining the Newport Gwent Dragons.