By Tzvi Machlin If the PGA Tour participants at the RBC Canadian Open bring this same energy to next week’s U.S. Open, we could have a historic major ahead. Heading into the final round of the RBC, Rory McIlroy and Tony Finau are tied for the lead at 11 under par. But four other golfers are nipping at their heels. Justin Thomas, Sam Burns, Wyndham Clark and Alex Smalley are all right there at nine under par. A few others – Austin Cook and Jim Knous – could be in the running with a big day at seven under par. Golf fans are loving how crowded the leaderboard is heading into the final round. Just…