NEW YORK -- Retired NBA star Kobe Bryant is moving to Wall Street, announcing the formation of a $100 million venture capital fund to invest in media, technology and data companies.The fund, known as Bryant Stibel, is being co-managed by investor Jeff Stibel. The two met through mutual friends, Stibel said.Bryant Stibel has already made investments in 15 companies, including LegalZoom and home juicing company Juicero, according to their website. The firm was founded in 2013, but is going public now with the retirement of Bryant from the Lakers.Stibel said the firm is focused on companies at all stages of growth.We are actively looking for great entrepreneurs, but we are in no hurry to deploy capital, he said.Bryant earned roughly $680 million in salary and endorsements during his 18-year NBA career, according to Forbes, and has been in the process of transition from professional athlete to businessman. Bryant created a company in 2014 called Kobe Inc. to help handle his image. 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New Balance Clearance Uk . -- Five former Kansas City Chiefs players who were on the team between 1987 and 1993 filed a lawsuit Tuesday claiming the team hid and even lied about the risks of head injuries during that time period when there was no collective bargaining agreement in place in the NFL. CHICAGO -- Continuing to play despite a concussion doubles recovery time for teen athletes and leads to worse short-term mental function than in those immediately removed from action, a study found.Its billed as the first to compare recovery outcomes for athletes removed from a game or practice compared with those who arent. The study was small, involving 69 teens treated at a University of Pittsburgh Medical Center concussion clinic, but the results bolster evidence supporting the growing number of return-to-play laws and policies nationwideThe study was published Monday in the journal Pediatrics.KEEPING SCOREThe study involved athletes aged 15 on average from several sports, including football, soccer, ice hockey and basketball who had concussions during a game or practice. Half continued to play and took 44 days on average to recover from symptoms, versus 22 days in those who were immediately sidelined.Sidelined players reported symptoms immediately, including dizziness, headaches, mental fogginess and fatigue, and were diagnosed with concussions by trainers or team physicians. The others, who continued playing for 19 minutes on average, delayed reporting symptoms and were diagnosed later.Those who continued to play had worse scores on mental function tests performed eight days after the concussion and 30 days after the concussion. Medical records showed mental function had been similar in all players before their concussions.RISKY RETURNSReturn-to-play policies are widespread, especially in youth athletics, and they typically recommend ssidelining players after a suspected concussion until symptoms resolve.ddddddddddddOne of the main reasons is to prevent a rare condition called second-impact syndrome -- potentially fatal brain swelling or bleeding that can occur when a player still recovering from a concussion gets hit again in the head.The study results show that a prolonged recovery is another important risk from returning to play too soon -- one that no one had really calculated until now, said Dr. Allen Sills, a Vanderbilt University neurosurgeon. He was not involved in the research.NOT REPORTEDAbout 300,000 sports-related concussions occur each year nationwide among all ages. In high school athletics, they occur at a rate of almost 3 per 10,000 games or practices.Evidence suggests up to 50 percent of concussions in teen sports arent reported. Athletes are sometimes not aware theyve experienced a concussion, or they suspect a head injury but continue playing because they dont want to let their teammates down, said University of Arkansas concussion researcher R.J. Elbin, the studys lead author.The results give us more ammunition to persuade young athletes to heed the return-to-play advice, Elbin said.---Online:Pediatrics: http://www.pediatrics.orgCDC: http://www.cdc.gov/headsup/youthsports/---Follow AP Medical Writer Lindsey Tanner at http://www.twitter.com/LindseyTanner. Her work can be found at http://bigstory.ap.org/content/lindsey-tanner ' ' '