That'd be historically excellent for SU. Top-ten, I think (not going to look it up now).
I lied, had to look it up. (By the way, terrific job as always by SU - apparently they don't want to publish SU's career leaders and record-holders on their website anymore. Super. Thanks, guys.)
It's true, within the context of Syracuse's history, 37.5% from three is excellent. In 30 years of the shot, with however many players we've had, only 15 guys have even topped 35% for their career (minimum 100 attempts; sorry, Tyler Ennis). From orangehoops.org, those who had strong careers but missed the 37.5% cut-off:
15.
http://www.orangehoops.org/GMcNamara.htm 35.4% (maximum of 36.3 minutes per game)
14.
http://www.orangehoops.org/DNichols.htm 35.8% (maximum of 34.8 minutes per game)
13.
http://www.orangehoops.org/TBurgan.htm 35.9% (maximum of 36.7 minutes per game)
12.
http://www.orangehoops.org/AJardine.htm 36.4% (maximum of 32 minutes per game)
11.
http://www.orangehoops.org/SMcCorkle.htm 36.5% (career sub; never more than 16.7 minutes per)
9.
http://www.orangehoops.org/MHopkins.htm 37.0% ( maximum of 28.2 minutes per game)
9.
http://www.orangehoops.org/JSoutherland.htm 37.0% (infrequent starter, never more than 29.5 minutes per)
8.
http://www.orangehoops.org/ARautins.htm 37.4% (maximum of 32.5 minutes per)
And the super seven who topped 37.5% for their careers (better than those "average" guys like Rautins):
6.
http://www.orangehoops.org/EDevendorf.htm 37.8% (maximum of 33.9 minutes per)
6.
http://www.orangehoops.org/PShumpert.htm 37.8% (maximum of 36.9 minutes per)
5.
http://www.orangehoops.org/MookieJones.htm 39.7% (career bench-warmer)
4.
http://www.orangehoops.org/MJanulis.htm 39.9% (maximum of 32.5 minutes per)
3.
http://www.orangehoops.org/WJohnson.htm 41.5% (35 minutes per)
2.
http://www.orangehoops.org/MRoe.htm 43.3% (maximum of 25.8 minutes per)
1.
http://www.orangehoops.org/GMonroe.htm 43.9% (31 minutes per)
To take this in a different direction, I've also added players' minutes. That Cooney plays the minutes he does is especially strange when considered in the context of the above list: here we've got guys who are actually productive three-point shooters, some of whom played on great teams but many of whom played with talent comparable to what Cooney's working with, most of whom were serviceably well-rounded on offense (even Marius Janulis managed to shoot better than 40% from the field), and all of whom were deemed less important to keep on the court than Cooney has been in recent seasons (perhaps college kids did get tired in those days?).
I don't know why he's moved in this direction, but Boeheim has gotten more extreme in his treatment of starters' minutes in the twilight of his career. No one can prove this, but the numbers suggest that this has had a detrimental effect on the productivity of the team.