WARNING: This will make ya a little teary-eyed ...

Dallas Cowboys legend Drew Pearson learned Wednesday he was snubbed from the Pro Football Hall of Fame yet again ... and his reaction to the news will break your heart into pieces.

Drew -- Roger Staubach's favorite target in the 1970s -- had as good a chance as ever of being elected into the Hall this year given its expanded class of 20 TOTAL inductees.

But, when the names were called over a two-hour period and Pearson -- who held a party for the announcements -- didn't make the list ... it was devastating.

Drew rubbed his forehead and fought back tears ... and it was super emotional.

Later, after the news had really sunk in ... a frustrated Drew told his family and friends, "They broke my heart. They broke my heart and they did it like this! They strung it out like this!"

Pearson had every right to be upset ... he's one of the best receivers EVER -- earning three All-Pro awards and winning a Super Bowl with the Cowboys in 1978.

He's most famous for catching what is widely known as the NFL's first-ever successful "Hail Mary" in a playoff game against the Minnesota Vikings in 1975.

The names that were called during Wednesday's announcements included Jim Covert, Winston Hill, Harold Carmichael, Duke Slater, Ed Sprinkle, Steve Sabol, Alex Karras, Bobby Dillon, Donnie Shell, George Young, Cliff Harris, Mac Speedie and Paul Tagliabue.