PLEASANTON — Fulfilling a lifelong dream sometimes comes with complications. Just ask the Piscotty family.

Fantasy met reality in Pleasanton Thursday when Stephen Piscotty was traded from the St. Louis Cardinals to his hometown Oakland A’s, the team he’s rooted for since he met Mark McGwire as a 5-year-old.

The news thrilled coaches and teachers at Amador Valley High who remember when the unassuming Piscotty carried the unofficial title of “the best hitter in the East Bay.” But circumstances overshadowed what should have been a purely joyous day for the Piscottys. “Bittersweet” was a word Stephen and both of his parents used to describe the deal.

Having Stephen back home and wearing their beloved green and gold is almost as much of a blessing for the Piscottys as it is just having their tight-knit family back together. That’s because his mom, Gretchen, has been battling ALS since May. For complete Oakland A’s coverage follow us on Flipboard.

Since her diagnosis, Gretchen and the family have been humbled by the overwhelming compassion and support shown by the Cardinals, as well as fans and friends from St. Louis to the East Bay.

“I wish I didn’t need all of their support, but it’s nice to have it,” Gretchen said.

Her debilitating illness was one of the factors that led to St. Louis clearing some outfield surplus by trading their 26-year-old for a pair of A’s prospects so Gretchen’s middle son could be back near his mom.

“I’m sure the Cardinals could have sent him to a lot of different places and they chose one that’s helpful to our family,” said Piscotty’s father, Mike, who admitted to some trepidation as he scoured the web for recent trade rumors involving his son. “I’m grateful for both organizations.”

“We’re thrilled he’s with the team he grew up with, but we loved being with the Cardinals,” he added. “The people there are just amazing. They made us feel like family. They call it baseball heaven and it’s pretty dang close to that.”

Stephen, who bought a home near St. Louis five months ago but stays with his parents during the off-season, was golfing at Pebble Beach Thursday morning when he got word of the trade. He immediately texted his dad.

“He told me it’s a little bittersweet but that he’s really excited about being with the home team,” Mike said. “He said it’s a dream come true. He’s pretty excited.”

Gretchen was also conflicted after finding out about the deal with life-altering ramifications.

“I guess I would say it was bittersweet,” she said. “I wasn’t 100 percent sure how to feel about it. The Cardinals have been really good to Stephen and good to us. We made a lot of friends there. I feel like one of the luckiest people to have been able to experience their hospitality. I still have immense gratitude that they drafted Stephen back in June 2012.

“But then my phone just blew up with congratulations that he was coming home,” Gretchen added. “I thought about how it will be easier for all of our friends and family to come see him play. (And) it will be nice to not have to fly on a plane to go see him play. It will be nice to have him around and closer to home.”

She then paused before laughing, “So I said, ‘OK, I guess it’s a good thing.’ ”

It was certainly good for Mike Piscotty’s wardrobe budget — he proudly pointed out he’s already got all the A’s clothing he needs. He’s accumulated plenty of gear as an A’s season ticket holder the past 22 years, when he’s taken Gretchen and his boys, Nick, Stephen and Austin to hundreds of games at the Coliseum.

It doesn’t matter that as an A’s player now his son can provide him with free tickets, Mike has no intention of giving up those season tickets. In fact, he’s quite certain more of his friends are going to want to join his season ticket group.

The man who still gets goose bumps when talking about how the A’s rallied down the stretch to win the 2013 AL West title can’t wait to get that feeling back while watching his son.

“The way I felt sitting there and watching Stephen play in the playoffs (with the Cardinals) for the first time, I’ve felt that same way having been an A’s fan,” Mike said. “I hope Stephen and their young group of players can get them back to that point.”

But for now, it’s the off-season. And the off-season is family vacation time for the Piscottys.

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New A’s outfielder Stephen Piscotty a popular subject at his old school First up is a trip to Las Vegas in January, where Mike has to attend a business seminar for his work at the Lawrence Livermore National Lab. Then comes family fun time there. As fate would have it in this magical time for the Piscottys, the keynote speaker in Vegas — who was hired some time ago — is the man who helped the family’s dream come true, Stephen’s new boss, Billy Beane.

Yep, sure feels like home for the Piscotty family.