The 30-year-old had two different spells with Bournemouth, and featured 115 times, but fell out of favour at the club.
July 6, 2018
The striker had been receiving interest from Birmingham, Leeds and Middlesborough, but put pen to paper with Nottingham Forest.
Grabban spent the majority of the season on loan last season, with Sunderland and Aston Villa, where he scored 20 Championship goals in 28 starts.
Grabban's signing was confirmed for an undisclosed fee, according to 'Sky Sports'.