Though he praised San Diego FC, one soccer expert said he doubts the unbeaten first-year team’s aggressive style will work nearly so well late in Major League Soccer’s marathon. “People are gonna pick ‘em apart as the season comes along,” former MLS goalkeeper Jay Nolly, the radio analyst for Real Salt Lake, said late in San Diego’s 3-1 victory two Saturdays ago in Utah. It will take several months to assess Nolly’s forecast. But it can’t be disputed that an MLS season demands great adaptiveness and depth. The season runs 34 games, a length that wears down many players. MLS matches are played in all four seasons: winter, spring, summer and fall. Further, the revenue-driven endurance test requires many players to perform in other MLS matches and national-team competitions. Good soccer demands legs that are somewhat fresh. It’s a wonder that, come fall, any MLS roster has enough juice to put on an entertaining show. A pivotal attrition test for SDFC will involve midfielder Jeppe Tverskov. A big part of the team’s unbeaten status through four matches has been the 6-foot-1 Dane’s clean ball control and passing. Given his role’s heavy demands and that he’s played all 360 minutes, Tverskov already has run some 30 miles this season. He turned 32 last week. Thirty regular-season MLS games remain. San Diego’s performances, resulting in two road victories and two ties against good teams, reflect well on the expertise of its planners and players. The absence of defeat isn’t a fluke. By possessing the ball more than each opponent, coach Mike Varas’ side has established a core style that’s also fun to watch. The compact shape maintained by the players has enabled a short-pass game to thrive. “They are close together,” coach Greg Vanney of defending champion LA Galaxy, said after SDFC’s 2-0 victory in the opener. “So, organizing the recovery of the ball isn’t always so easy because they are in good spots. And, they move the ball pretty quickly.” In a nod toward Varas’ tactics, Galaxy forward Christian Ramirez, a 13-year pro, said San Diego “changed a few things in their build-up that made it difficult for us.” Within the MLS season, soccer fans in San Diego will often have the option of watching the sport’s best leagues. The beautiful game as played in England, Italy, Spain, Germany, France and Brazil can make it tough for the MLS to attract aficionados who avail themselves of global broadcasts. By MLS standards, SDFC is playing well. That may be enough to draw local soccer cognoscenti to Mission Valley and the team’s broadcasts. Central to the San Diego newbies outperforming their expansion status has been the midfield combination of Tverskov and Luca de la Torre, the latter a San Diegan who has played in three different European leagues. May the soccer gods keep these two orchestrators healthy. “Their team is predicated on their two pivots,” said Real Salt Lake coach Pablo Mastroeni, a former MLS defender. “They do an unbelievable job of controlling the game.” As the long season takes its toll, San Diego FC may be grateful that several players aren’t very old. De la Torre is 26. So is Anders Dreyer, the Danish right wing who has three goals and seven shots on goal. Super-sub Onni Valakari, 25, has a goal and an assist; the team’s plus-3 goal differential with the Finnish midfielder is tied for MLS honors. Among the young reserves, Colombian wing Tomas Angel, 22, has stood out. He softened the absence of injured star Hirving “Chucky” Lozano by assisting two goals. At Utah, a late-game burst by Ghana’s Willy Kumado, 22, led to Dreyer’s tie-breaking goal. English forward Alex Mighten, 22, mustered a threatening speed-and-skill burst Saturday in his season debut. So, as Mastroeni said, there’s a “good blend” to this team. Whatever its destination to what will seem at times like an endless journey, San Diego FC has pulled off an entertaining, well-conceived launch.