SAN DIEGO -- Major League Baseball is telling managers to cool it on arguing balls and strikes, and warning them not to rely on replay help to bolster their beefs.MLB executive Joe Torre sent a memo Friday to managers, general managers and assistant general managers that said: This highly inappropriate conduct is detrimental to the game and must stop immediately.The memo was obtained Saturday by The Associated Press.Although disagreements over ball and strike calls are natural, the prevalence of manager ejections simply cannot continue, Torre wrote. This conduct not only delays the game, but it also has the propensity to undermine the integrity of the umpires on the field.Torre, a Hall of Fame manager and former NL MVP, said skippers are increasingly relying on technology from the clubhouse or video room to argue from the dugout. Every pitch and play is monitored by teams in case they want to challenge for a replay review.He called that an express violation of the Replay Regulations, which state that `on-field personnel in the dugout may not discuss any issue with individuals in their video review room using the dugout phone other than whether to challenge a play subject to video replay review.Detroit manager Brad Ausmus was ejected for arguing balls and strikes and covered home plate with a sweat shirt earlier this season, and Boston manager John Farrell was tossed during an animated dispute alongside Red Sox slugger David Ortiz.Earlier this month, Cubs manager Joe Maddon was ejected while arguing from the dugout.And as recently as Friday night, Oakland manager Bob Melvin and San Francisco skipper Bruce Bochy got tossed for arguing balls and strikes along with players on their respective teams.Torre concluded by advising that any manager or coach ejected for arguing balls and strikes hereafter will be disciplined, including at least a fine.---Follow Bernie Wilson on Twitter at http://twitter.com/berniewilson Cheap Air Max 2018 . 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My 7-year-old doesnt aspire to play in the NFL or NBA or NHL; he wants to be a ninja warrior.Raptly watching Monday nights season finale of American Ninja Warrior on NBC, he pleaded for an extension to his bedtime so he could watch it all the way through.My second-grader plays a number of sports -- soccer, basketball, flag football -- but given the option at recess, he would rather fling himself across the playground bars specifically to hone his ninja skills than play foursquare or anything else.For his upcoming 8th birthday, all he wants is a backyard pull-up bar contraption to work on his grip strength, the north-star physical quality for would-be ninja warriors -- like 40 time for a football player, velocity for a promising pitcher or length for NBA prospects.He obsessively follows his favorite ninjas: No different than his geography-infused love of other teams and athletes based in DC, his favorite is sports-TV cameraman Geoff Britten of suburban Maryland, who last season became the first official American Ninja Warrior. But he also loves Joe The Weatherman Moravsky (an actual meteorologist), Drew The Real Ninja Dreschel and this seasons breakout sensation, stuntwoman Jessi Graff, who got further in ANW than any other woman competitor.My kid is hardly alone. Throughout school, kids enthusiastically discuss the show and universally respect the sport. When I post photos or videos of him at a local ninja gym, I typically get multiple follow-ups from parents: Where is that? Do they have kids classes?Why do kids gravitate toward this activity? I think it is mainly three factors:Simplicity: Climbing, hanging, sliding, jumping -- these are basic physical moves virtually any kid can do. It appeals to a raw primal instinct for moving, adapting and surviving, Chris Wilczewski said. He is an American Ninja Warrior 2016 national finalist, owner of Movement Lab in New Jersey and founder of the nascent National Ninja League. It mimics movements found on playgrounds.Accessibility: Drawing inspiration from its philosophical partner, parkour, kids doing ninja workouts require very little beyond the physical space around them. Any equipment found at a school playground or neighborhood park can work, but I have also learned to refrain from auto-scolding my kids when they hop on (and off) a random sidewalk bench or propel themselves under (or over) railings. Other sports depend heavily on mastering different pieces of equipment, Wilczewski said. Ninja Warrior relies so heavilyy on utilizing ones own body.ddddddddddddA note on safety: Like any parent, I often cringe when my kid climbs on the playground equipment -- or plays any sport where there might be contact, either with people or objects. As with every activity, being taught proper techniques when appropriate and proceeding with a commensurate level of caution are paramount to the experience.)As much as anything, the competitors are normal-sized (although as in the case of Britten, they often have Popeye-sized forearms); the kids can see themselves in the pro ninjas far more easily than they can in the goliath athletes of traditional pro sports. Also, the sport is still small enough that you can still connect with top competitors on social media. Britten liked a Twitter video of my son doing a youth-sized rings obstacle, and the kid was thrilled.Fun: Even when you watch the elite level on TV, the competitors are cheering each other on and marveling at new displays of technique or fitness. Kids are naturally competitive, but the obstacles are challenging enough that personal best is largely the standard. Kids can push themselves without pushing others around, and playground credibility is earned just as much by designing a challenging new obstacle pattern as it is from successfully navigating it.When ninja competitors on TV fail -- and virtually everyone inevitably fails -- they smile and appreciate the process, rather than focus on the outcome. Plus, the pop-culture phenomenon of Ninja Warrior has put just enough structure around the sport to legitimize it for kids while still encouraging free play.I always imagined my first travel sports experience as a parent would be to some far-flung AAU basketball tournament. A month from now, I will be driving my 7-year-old two hours away to a Pennsylvania gym for an 8-and-under regional competition for the National Ninja League. I couldnt be more thrilled that he has found a sport he loves, but for the moment, I am equally happy to lean on the advice that Wilczewski had for any parent whose kids are similarly ninja-obsessed but cant necessarily truck to some obstacle-course warehouse or regional competition: Just take them to the playground.Dan Shanoff writes about parenting for espnW. You can connect with him on Twitter at @danshanoff or follow the youth-sports journey of his kids on Instagram at @danshanoff. ' ' '