KANSAS CITY, Mo. (WFAN/AP) — The relentless booing of the Yankees’ Robinson Cano by Kansas City fans during the All-Star Home Run Derby on Monday night drew national attention, and in some places scorn.

Cano took it in stride. But after the National League’s 8-0 victory Tuesday night, the second baseman said some fans crossed the line.

“I knew coming in I was going to get booed,” Cano said. “The only thing that I would say that I didn’t like was the way they treated my family when they went to the restroom. But it’s part of the game, and hopefully it stops here and we’ll move forward.”

He explained that unhappy fans were “yelling stuff” at the Cano clan.

“That’s not the right thing,” Cano said. “You know, this is a game and we’re All-Stars. I mean, if I get booed, I don’t really care. But I mean, when they start with your family, that’s over the line.”

Fans were upset after Cano, the captain of the American League squad, said he would choose a hometown player for his four-man derby team, but instead bypassed Royals star Billy Butler and went with Prince Fielder of the Tigers, Mark Trumbo of the Angels and Jose Bautista of the Blue Jays.

Special CBS Local Offer: Visit CBS Local Offers today for 42% off Yankees tickets for select home games in July.

Fielder won the competition, and the AL routed the National League.

Cano wound up going 0 for 10, though, and each failure was met by cheers. Cano initially brushed off the cold reception, but others weren’t so kind to Kansas City. Several national TV broadcasters, radio hosts and columnists called the fans everything from “jerks” to “classless.”

“Robinson Cano certainly picked people he thought should be on there,” Commissioner Bud Selig told the Baseball Writers’ Association of America on Tuesday. “While I understand Kansas City and I understand the whole Billy Butler thing, I really felt very badly last night.”

Union head Michael Weiner thought the level of jeering was not justified.

“It struck me that it moved a little bit past traditional, good-natured booing, particularly for an event like that, and got into another area,” Weiner said. “But Robinson Cano grew up in the Dominican Republic, plays in the Bronx, plays for the Yankees. He’s going to be fine.”

Cano said that he was prepared for a frigid reception, even though it appeared to rattle him every time his father, Jose, delivered a pitch that he popped up, fouled off or grounded out.

“I know Robbie, obviously, and this is supposed to be fun,” MLB executive VP of baseball operations Joe Torre said. “That probably kept it from being a lot of fun for him. I’m sorry about that.”

Yankees teammates Curtis Granderson and CC Sabathia even interrupted the proceedings to give father and son and a pep talk, but it didn’t do a whole lot of good.

“It was interesting,” Granderson said. “It was one of those things where once it started, everyone else caught on, and the performance that Robbie was able to do just added to it. But it’s like Robinson said, we’re the Yankees, we get booed all the time.”

The booing didn’t stop on Tuesday night, either. While fans cheered every other player during pregame introductions – including fellow Yankees Derek Jeter and Granderson – they still jeered Cano when he trotted out from the home dugout.

Yankees star Alex Rodriguez sent Cano a text message of encouragement Monday night – “He said, you know, he’s a guy that’s looking out for me,” Cano said – and many others came to his defense.

“I’m sure it happens in every ballpark, where there’s the hometown guy didn’t make it, and in Robbie’s defense, it’s hard to pick three guys,” White Sox slugger Adam Dunn said. “It would be hard, man, and it’s kind of a tough spot to be put in.”

Brewers outfielder Ryan Braun questioned the practice of having players pick the teams.

“I understand why they have a captain, but I also feel like it puts guys in uncomfortable positions,” he said, adding that he’s certain David Wright of the Mets will be chosen next year, when the All-Star game is played at Flushing’s Citi Field.

“You don’t want to deal with what Robinson dealt with,” Braun said.

The passionate reaction by Royals fans created plenty of drama, though, particularly in an event that often becomes stale by the time the first round grinds to a conclusion.

Viewership was up 3 percent over last year, and in New York, there was a 10 percent increase as hometown fans tuned in to see Cano flame out. There were more than 800,000 Twitter and Facebook comments throughout the night, twice the volume of last year, and Twitter’s top 10 trends worldwide were related to the derby when the final round began.

Butler, who made his first All-Star team this season, did his best to deflect questions about the relentless booing. He said that he appreciated Kansas City fans for their support, and that he spoke to Cano after the derby to make sure everything was fine.

“There are no hard feelings. There never was,” Butler said. “Me and Robbie are great friends, we’re great competitors, and love playing each other.”

Mets fans, how will you react if David Wright isn’t picked next year? Be heard in the comments below…

(TM and Copyright 2012 CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2011 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)