Alex Avila says his mom was upset after dad Al traded him to Cubs

Detroit Tigers general manager Al Avila negotiated what he thought was a fair trade in the hours before the July 31 deadline when he sent left-hander Justin Wilson and catcher Alex Avila to the Chicago Cubs for a package that included prospects Jeimer Candelario and Isaac Paredes.

However, it appears that Al Avila made the trade without consulting the most important scout: his wife, who just so happens to be the mother of Al's son, Alex Avila.

In a very rare twist on a trade in professional sports, Al Avila actually traded away his son Alex on Sunday. Father and son were happy about the deal for multiple reasons, but in his introduction at Wrigley Field on Tuesday, Alex revealed that his mother, Yamile Avila, was unhappy with the transaction.

"I think she's more upset she won't see her grandchildren as much," Avila said, according to MLB.com's Carrie Muskat.

When Al sent Alex to the Cubs, it marked the first time a baseball GM had traded his son since 1968, when then-Dodgers GM Al Campanis traded his son, Jim, to the Royals.

Al and Alex have already parted ways once in their professional careers. After the 2015 season, Al didn't offer Alex a new contract, and he left the Tigers to spend a year with the White Sox. Last winter, Al brought his son back home on a one-year deal, and Alex made his papa proud with a fine half-season that showed the Cubs enough to want to deal their top prospect away in order to acquire him.

While Yamile Avila obviously wasn't happy to see her son leave Detroit again, Alex gave his assurances that as the member of a three-generation baseball family - Ralph Avila, Al's father and Alex's grandfather, is a former Dodgers vice-president - she, along with the rest of the Avila clan, was ultimately OK with the move.

"We (my dad and I) have a great relationship," Alex said. "But when it comes to doing our job, we both have to do our jobs. He had to. There was nothing more to it than that. I know a lot of people like to crack jokes, and obviously it's a unique situation. We got to spend a lot of time together, he got to watch me play a lot of Major League Baseball games over the last eight, nine years. It's been amazing. We've had something a lot of people don't get to experience."