McLaren are preparing for a tough season-opening weekend in Melbourne and arrive with a number of unknowns, according to racing director Eric Boullier. Jenson Button and Fernando Alonso completed a combined 780 laps over two weeks in Barcelona but the Honda-powered team failed to complete their full pre-season testing programme.McLaren are set to trial their 2016 package in Fridays practice at the Australian GP, and Boullier said: Its been a very long winter, and I know that I can speak on behalf of the whole McLaren-Honda team when I say that we cant wait to go racing again! We are certainly a step ahead of where we were this time last year in terms of preparation. That said, we didnt manage to complete our final configuration and set-up work for the first race, so we go to Melbourne with a number of unknowns. It wont be an easy start to the weekend in that sense, since well need to concentrate on setting the car up for each session and readying the final specification of our package as soon as we get to Albert Park.The results of the MP4-31 from testing seem to point at improved reliability, but it still remains to be seen where McLaren will find themselves in the pecking order.The team endured their worst season in 30 years in 2015 and finished the second pre-season test with a time which was two seconds adrift of Ferraris leading pace. Every race live in 2016 Sky Sports F1 brings you every race live in 2016. Fast and easy online upgrade - click here. Alonso has vowed not to make any predictions for the first race at Albert Park while Button is hoping to see the new rules for the 2016 season help produce more unpredictable results.This is the first chance for us to compare ourselves on similar set-ups, Button said. Weve been concentrating heavily on our own development and processes, so Im looking forward to seeing where we are on a level playing field. Melbourne will certainly be a challenge, but our package definitely feels like a step forward from last year. There are so many more variables this year - new qualifying format, new tyre regulations, and Australia usually produces unpredictable races, so anything could happen!The first race of the 2016 F1 season, the Australian GP, is exclusively live on Sky Sports F1. The race in Melbourne starts at 5am on Sunday March 20. Or watch for £6.99 without a contract, on NOW TV. Also See: The Formula 1 gossip column Every race live in 2016: Get Sky F1 Richaun Holmes Suns Jersey . They hope to persuade the other team owners and commissioner Roger Goodell to put pressure on Redskins owner Daniel Snyder to drop the nickname they find offensive. 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Plouffe batted .254 with 14 home runs and 52 RBIs in 477 at-bats last season, his second as a regular in the lineup. SAN DIEGO -- Rookie defensive end Joey Bosa finally made it back onto the field for the San Diego Chargers on Tuesday after a long holdout.From a fitness perspective, coach Mike McCoy said the No. 3 pick in this years draft looked fine.He looked as we expected, McCoy said. He was in shape and ready to roll. He looked the way he did when he left.Bosa missed 31 days and three preseason games during a nasty contract spat that included disagreement over payment of Bosas $17 million signing bonus and whether the contract would have offset language. He eventually signed Monday and Bosa said hes capable of playing in the opener on Sept. 11 at the Kansas City Chiefs.First, the Chargers wrap up the preseason schedule on Thursday hosting the San Francisco 49ers but Bosas not expected to play.Its not up to me, its up to the coaches, he said. And they have a plan and they are going to do whatever they feel is necessary.Bosa said his teammates have welcomed him with open arms.Theyre aware of the business off the NFL and why I wasnt here, Bosa said.dddddddddddd There is no bad blood between any of us. They are just excited to have me out there and Im excited to be out there.Nose tackle Ryan Carrethers said Bosa returned to the fold easily.It wasnt like he was a new guy showing up, said Carrethers. He was already with us in the spring.Its the training camp workouts that he missed.Bosa acknowledged Monday was a long day as he did extra work with Chargers coaches to learn the schemes.It is what Ive got to do to get back to speed, he said. Im planning to do the same today.What Bosa hasnt done is deliver hits or absorb one. The Chargers workouts are light this week with them playing two games in five days.I still havent put pads on, he said. So Im sure that is going to be the toughest thing to get accustomed to.---Online: http://pro32.ap.org/poll and http://twitter.com/AP-NFL ' ' '