The Big Ten conference is a college football division 1 conference. I did a research study showcasing how many tight ends are from the Big Ten conference in the NFL:

Arizona Cardinals: 4 tight ends 2 from the big ten

Atlanta Falcons: 4 tight ends 0 from the big ten

Baltimore Ravens: 4 tight ends 0 from the big ten

Buffalo Bills: 4 tight ends 0 from the big ten

Carolina Panthers: 4 tight ends 0 from the big ten

Chicago Bears: 3 tight ends 1 from the big ten

Cincinnati Bengals: 6 tight ends 3 from the big ten

Dallas Cowboys: 4 tight ends 3 from the big ten

Denver Broncos: 4 tight ends 0 from the big ten

Detroit Lions: 5 tight ends 1 from the big ten

Green Bay Packers: 4 tight ends 0 from the big ten

Houston Texans: 4 tight ends 1 from the big ten

Indianapolis Colts: 4 tight ends 1 from the big ten

Jacksonville Jaguars: 4 tight ends 1 from the big ten

Kansas City Chiefs: 5 tight ends 0 from the big ten

Las Vegas Raiders: 4 tight ends 1 from the big ten

Los Angeles Chargers: 4 tight ends 0 from the big ten

Los Angeles Rams: 4 tight ends 0 from the big ten

Miami Dolphins: 4 tight ends 0 from the big ten

Minnesota Vikings: 4 tight ends 1 from the big ten

New England Patriots: 2 tight ends 0 from the big ten

New Orleans Saints: 5 tight ends 1 from the big ten

New York Giants: 4 tight ends 2 from the big ten

New York Jets: 4 tight ends 1 from the big ten

Philadelphia Eagles: 4 tight ends 0 from the big ten

Pittsburgh Steelers: 4 tight ends 1 from the big ten

San Francisco 49ers: 4 tight ends 2 from the big ten

Seattle Seahawks: 4 tight ends 2 from the big ten

Tampa Bay Buccaneers: 4 tight ends 2 from the big ten

Tennessee Ttitans: 4 tight ends 1 from the big ten

Washington Commanders: 5 tight ends 0 from the big ten

This is every NFL team, and there is a total of 123 tight ends, 30 big ten tight ends, so 30÷123 is 24.39 percent.  24.39 percent of NFL tight ends are from the big ten. So nearly a quarter of NFL tight ends played in the big ten conference.