The San Diego Chargers wore their powder blue alternate uniforms on Sunday. As you know, one of the sports worlds most iron-clad rules states that whenever this uniform is worn, countless fans will respond by saying: They should go back to wearing their original powder blues from the 1960s. Those were the best football uniforms ever!And those fans are right -- mostly. The Chargers original powder blues were gorgeous. What many fans dont realize, though, is that the teams original powder blue period, which ran from 1960 through 1973, actually featured a surprisingly large number of variations, with many of the uniforms key elements -- the helmet, the pants, and even the shade of blue used on the jerseys -- in constant flux. So when people talk about the Chargers original powder blues, theyre actually referring to a wider range of uniforms than they probably realize.Lets look at some of those variations, one uniform element at a time:1. The shade of blue. The Chargers actually used four different blue tones from 1960 through 1973. All of them looked pretty good, but only the final one, in use from 1968 through 73, could be described as a true powder blue.The color that the team uses for its current powder blue alternates -- the uniform set worn this past Sunday -- is lighter than any of those original shades of blue.2. The helmet bolts. The lightning bolts on the Chargers helmets have always been gold, right? Wrong. The bolts were blue for the teams inaugural season in 1960 (and so were the bolts on the blue jersey that year). After changing to gold in 1961, the helmet bolts were blue again in 1966 (but the bolts on the blue jersey stayed gold that time around).3. The pants. When you think of the Chargers powder blue era, which pants do you instinctively envision them wearing? Its a trickier question than you might think, because the Chargers wore four different pant designs from 1960 through 1973: white with blue lightning bolts down the sides; white with gold bolts; gold with blue bolts; and gold with conventional striping.The reality, of course, is that all of these uniform combinations looked good on the field (and so did their assorted white-jerseyed counterparts, for that matter), so you could mix and match just about any of these elements and it would still turn out fine. Still, its interesting to see just how much variety there was in such a short time period.Meanwhile, theres one other detail from the Chargers early days thats worth mentioning: In 1962, San Diego was among the recipients of the All-America City Award, a civic honor bestowed annually on 10 communities around the nation. The Chargers responded to this by wearing a commemorative decal on the crown of their helmets in 1963.That decal has never been included on a Chargers throwback uni. Wouldnt it be cool to see it on the field again? Hey, team owner Alex Spanos: Make it happen, capn.(Special thanks to William Schaefer of the Gridiron Uniform Database for his research assistance.)Would you like to nominate a uniform or uni element to be showcased in a future Friday Flashback installment? Send your suggestions herePaul Lukas wishes the Chargers would restore the uniform numbers to the sides of their helmets. If you like this column, youll probably like his Uni Watch Blog, plus you can follow him on Twitter and Facebook. Want to learn about his Uni Watch Membership Program, be added to his mailing list so youll always know when a new column has been posted or just ask him a question? Contact him here. Walter McCarty Jersey . Team physician Dr. Steve Traina performed the surgery Friday. Robinson was injured in a spill underneath the Nuggets basket during the first quarter of Wednesday nights loss to the Charlotte Bobcats. Custom Boston Celtics Jerseys . 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Injury-marred Navy will try to keep pace with Louisiana Tech and its high-flying offense when the teams meet Friday in the Armed Forces Bowl in Fort Worth, Texas (4:30 p.m. ET, ESPN).The Midshipmen (9-3) have lost two starting quarterbacks and both co-captains this season, which directly led to the late slump.The Bulldogs (8-5) are ranked fifth in the nation in total offense and reached the Conference USA title game.Both teams dropped their past two games and are looking to finish the season strong.Every time you play in a bowl, you are representing not only your school, but your conference as well, Louisiana Tech coach Skip Holtz said. This is a chance to show the nation that Louisiana Tech has a good program and that Conference USA plays good football.Navy also had one of the nations most powerful attacks in the nation before starting quarterback Will Worth and slotback Toneo Gulley were injured on the same play in a 34-10 loss to Temple in the American Athletic Conference championship game. Navy then had its 14-game winning streak against Army snapped the following week with sophomore quarterback Zach Abey forced into action in a 21-17 loss.It was the first time the Midshipmen dropped back-to-back games since 2014, when they lost three in a row to Rutgers, Western Kentucky and Air Force. Nonetheless, a win in the Armed Forces Bowl would give the Navy back-to-back 10-win seasons for the first time in school history.This is a big game for us, Navy offensive coordinator and quarterbacks coach Ivin Jasper said. We have to win this football game. Weve had a great year. Weve had some losses here and there, but at the same time, weve won nine games with a chance to win 10. Were not going to hold our heads down. Were going to find a way to win this football game.Despite the injuries, Navy enters the game averaging 310.9 rushing yards per game. The Midshipmen will lean heavily on fullbacks Shawn White and Chris High to keep Louisiana Techs offense off the field.The Bulldogs average 44 points per game and are led by quarterbback Ryan Higgins, who has thrown for 4,208 yards -- third best in the nation.dddddddddddd Higgins also has 37 touchdown passes with just eight interceptions. He is ranked sixth in the country in passing efficiency (166.6) and eighth in completions per game (25).What Higgins has been able to do as a fifth-year senior is very impressive, Holtz said. His development has been one of the big reasons for our success. Higgins has done a great job of protecting the football and making good decisions. He understands the offense and has a very accurate arm.Higgins two favorite targets are receivers Trent Taylor and Carlos Henderson. Taylor has 124 receptions for 1,570 yards with 10 touchdowns, while Henderson enters the game with 72 catches for 1,406 yards and 17 touchdowns -- second in the nation. Henderson is also averaging 30.4 yards per kickoff return with another two touchdowns.Jarred Craft leads Louisiana Techs ground attack with 1,011 yards and nine touchdowns on 174 carries.The Bulldogs started the season 1/3 before going on a seven-game winning streak. Louisiana Tech then lost Southern Mississippi 39-24 in the regular-season finale and fell to Western Kentucky 58-44 in the Conference USA title game.The Midshipmen are allowing 429 yards and 29.7 points per game. Navy was dealt a key loss on defense when linebacker and co-captain Daniel Gonzales sustained a season-ending foot injury against Air Force on Oct. 1.The rest of the Midshipmen are trying to carry the load. They know a big challenge awaits against Louisiana Tech.They have a great offense, great receivers and great line, said Navy linebacker Micah Thomas, who leads the team with 98 tackles. We just have to play hard. Theyre going to catch the ball. Theyre going to get some yards on the ground. Its going to happen. We just have to play with our fundamentals and tackle well. Then, I think we should be OK to slow them down a little bit. ' ' '