Joe Gibbs Racing Xfinity Series driver Matt Tifft is out indefinitely after doctors found a brain tumor while treating him for a disk condition in his back.Tifft had surgery Friday afternoon, and his family said on his Twitter account Friday night that he is out of surgery and doing well.Tifft, 20, will need to spend time in rehabilitation before being cleared to race again.The tumor was about the size of a half-dollar and was located on the right side near his temple, about an inch into his brain at the deepest point, Tifft said in an interview Wednesday. It was not cancerous but had the potential to grow aggressively.Once doctors can test the tumor and know whether it was completely removed, Tifft will know the recovery plan and find out if he needs any chemotherapy or radiation.If not for the disc problem in his back, Tifft would never have known about the tumor. He said he had a concussion when he was younger and has always had some sensitivity to light. So he figured since he was having an MRI on his back, he had might as well have his head scanned. That is when doctors found the tumor, which Tifft said he might have had for years.We kind of lucked out that we found it when we did, Tifft said. Its not lucky it was there, but we are lucky that we caught it in plenty enough time. ... You never want to be thankful to be hurt, but in this case in a way, its bizarre how it worked out. ... Without that [back problem], who knows if I ever would have gone in?Tifft has competed in six Xfinity races this year, including three in the JGR No. 18 car. He sat on the pole in April at Talladega, where he finished a career-best eighth. He also finished eighth two weeks later at Dover.This has definitely been a breakout year, Tifft said. Its definitely a tough spot to be taken out right in the middle of your limited races. But I feel like, in a good way, where Im at in my career, I have really proven what I can do this year.This is just something Ive got to work through. ... Im just really appreciative of all the support [from the racing community] Ive gotten already. Its been pretty overwhelming.In addition to his part-time Xfinity schedule, Tifft was driving a part-time Camping World Truck Series schedule in the Red Horse Racing No. 11 truck. He finished a career-best fifth in his most recent outing in May at Charlotte. He has seven top-10 finishes in 18 career truck starts.David Ragan will replace Tifft in the JGR No. 18 Xfinity Series car this weekend at Daytona. Grizzlies Jerseys 2021 .ca looks back at the stories and moments that made the year memorable. Kyle Anderson Jersey . 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Mercedes chief Paddy Lowe thinks Formula One needs to start thinking about how the next set of engine regulations will look when the current cycle ends in 2020.F1s current V6 turbo era started in 2014, but has been criticised due to Mercedes huge dominance and a lack of noise from the engines. The current power units are set to remain until 2020 and Lowe thinks a long-term plan would avoid similar mistakes being made with the next set of rules.When asked about engines after 2020, Lowe said: Thats a good question and its a big question. I think it is about time we started to talk about the engine beyond this one.?And it does raise some very big considerations: how do we define an engine or power unit that is correct for the sport but also relevant to the kind of power units that we will see in the future in road cars? Do we make remain in some way related attached to that technology which is increasingly electrical or do we go our own way? So there are some very very important questions there.Lowe thinks the sound of the engines needs to be a key consideration post-2020 -- especially if F1 wants to remain relevant to road cars.That debate started really with the issue of the sound of these engines when they arriveed in 2014.dddddddddddd Its better now than it was back then but it doesnt match the sound of the old V8s or the V10s but it still raises an interesting debate.I think road cars of the future, at some point not that far off, will be completely silent if they are all electrical so will we want noise, will we associate noise with performance or not? There are some very interesting debates there and I think we need to start that process.Ferraris Jock Clear agreed with Lowe, saying it is important to give teams plenty of time to understand what the regulations will look like.It needs to be thought about. I think what we have learned from this cycle and this era of hybrid engines is that the power units now are very, very complicated and it needs a lot of planning and I think well go into those next negotiations with eyes wide open this time.I dont think theres anybody who didnt fall into the category of underestimating what might have been involved, and as such, [so] the sooner we start, the sooner well be aware and the sooner we can come to a solution that will be the best for the sport. ' ' '