The disk near his collar is an enlisted infantry branch insignia (crossed rifles), indicating he was an infantryman.
On his chest, the badge on top is the Combat Infantryman's Badge (CIB). It is hard to be certain with the ribbons because of a lack of color, but the top ribbon I believe to be a Purple Heart Medal. The three ribbons below may be the WWII Victory Medal, Good Conduct Medal and European, African, Middle Eastern Theater Service Medal. I think they may not be in the correct order of precedence.
In case you do not know, Anthony John Diglio 31330587 appears to have been an infantryman who served in combat during WWII, hence his CIB. He was seriously wounded by artillery fragments in Jan 1945, based on a NARA Medical care/ hospital admissions card. He would have received a Purple Heart for these wounds sustained in combat.
He was also likely (retroactively) eligible for a Bronze Star Medal based on his CIB.
Actually, I would say the one on the left is probably the American Campaign Medal, followed by the Good Conduct Medal, then the Europea-African-Middle Eastern Campaign Medal. The Victory Medal wasn't authorized until July 1945 (by Congress), then had to have promulgating instructions produced, then the ribbon and medal produced, so it wouldn't have been available until late 1945-early 1946. So you don't see a lot of those in World War II pictures--people who stayed in after the war, yes. Veterans, yes. But your average Joe getting a picture for his family, no.
And you're right, he'd be authorized a Bronze Star Medal in 1947 because he had a CIB--but he (or next of kin) had to ask for it.
