He made his professional debut with Mabo Livorno (Don Dosco's parent club) during the 2000-01 season, in the second division Serie A2, helping the side earn a promotion.

After that successful spell, he signed a three-year deal with fellow Serie A side Lottomatica Roma, however he didn't manage to crack the first team and a mid-season transfer to Spanish side Etosa Alicante was nearly completed before it was scrapped following an injury to his substitute Vassil Evtimov.

He made his debut for the senior Italian national team on 1 June 2002, scoring five points against Latvia, gradually working his way into the Italy fold over the next two seasons.

[7] Garri was the youngest member - at 22 - of the Italian squad that won a silver medal at the 2004 Summer Olympics,[1] contributing 4.5 points and 2.4 rebounds in more than 12 minutes per game, including 2 points (on 1-for-5 shooting), 6 rebounds and 2 blocks over 17 minutes during the final against Argentina.

[9] Garri was recalled for the 2006 FIBA World Championship,[9] averaging 4.3 points and 2.3 rebounds in around 12 minutes per game over the tournament.