Chuck Klingbeil was just one man, so he was an alumnus, not an alumni (the plural of alumnus). I'd also change passes away to has passed away. And I'd put a comma after age.
The Miami Dolphins have lost another alumnus at a far too young age, but it brings up questions about the players from the 1991 team as Chuck Klingbeil has passed away.
ALSO FOUND ONLINE: The New Mexico State alumni has kicked well enough in pre-season but there is still a lot of speculation on whether or not he will be on the roster at the end of the year.
This may be from the same writer as above. And, yes, it's alumnus, not alumni here. Alumni is plural.
I'd also put a comma after preseason (not pre-season).
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