Will Rory's blade collars bring him glory? Can Spieth repeat in blue? Will Fowler walk to victory in high-tops and joggers? And, what about Horschel's daring pants? Our Style Insider analyzes the apparel selections for the top players at Oakmont.

Jason Day (Adidas Golf)

Even though it is not summer yet, Adidas Golf is giving us a peek at its new Fall/Winter Collection through Jason Day, Dustin Johnson and Sergio Garcia. Day will feature the brand's new Climachill® Print Block Polo with 360° ventilation and an athletic color blocked design. The other two days, we'll see Day in the Climacool® 3-Stripes Polo that he wore during his victory at THE PLAYERS Championship. If it isn't broke, don't fix it.

Dustin Johnson (Adidas Golf)

It is a mix of old and new for Dustin Johnson at Oakmont as he blends classic styles with cutting-edge technology and modern hues. The new Gradient Polo from Adidas Golf adds subtle texture on two of the days and the brand's new Ray Blue color is a bold choice for the first and fourth rounds. DJ will stay cool with Adidas' Climacool technology with zonal cooling.

Sergio Garcia (Adidas Golf)

Sergio will find himself in fresh color-blocked designs from Adidas' newest collection. The best of the bunch is the Climacool Engineered Striped Polo with three shades of blue and a pop of pink. This is a solid script for Garcia, but it would have been fun to see him in the colors of his home country on Friday when Spain takes on Turkey in Euro 2016.

Rickie Fowler (Puma Golf)

No high-tops? No joggers? No problem. Rickie Fowler is kitted up for the U.S. Open in subtle textures, bold patterns, and patriotic colors. The colorful red, white and blue polo makes an aggressive statement out of the gate before he turns to his signature orange in the final round. Known for being a trendsetter in the headwear department, look for Rickie to wear three different styles of caps over the four days, including an ombré fade on Saturday.

Jordan Spieth (Under Armour)

Is it just me, or is Jordan Spieth's apparel getting a bit predictable at this point? Every week we seem to get a heavy dose of blue, gray and white, and it is more of the same for the defending champ. The tonal stripes and patterns are on point, but I'd like to see some fresher colors from Spieth.

Rory McIlroy (Nike Golf)

Rory has been favoring these sleek and modern blade collar polos from Nike all year, and it is easy to see why. They not only look great, but they are loaded with technology. McIlroy will alternate between striped and color blocked designs over the four days. The predominately gray color palette gives way to a sharp navy blue monochromatic kit on Sunday. Rumors are also flying around Rory's footwear selections for Oakmont. Could we see him lace up the new high tech Nike Flyknit Elite shoe? The one thing that confuses me about Rory's script is the neon yellow hat on the weekend. A splash of color is always good, but a more neutral color would create a smoother look.

Charl Schwartzel (Nike Golf)

My favorite Nike script belongs to Charl Schwartzel. The contemporary color-blocked designs showcase Nike's lively color stories for summer. Nike has also done a great job of selecting belts for Schwartzel and its other athletes. The tonal colors will create cohesive looks from top to bottom.

Brooks Koepka (Nike Golf)

Koepka is one of the longest hitters on TOUR, which is why outfitting him in a polo with a stretchy knit fabric and ergonomic seams is a brilliant decision. Like Schwartzel, Koepka's script highlights the Swoosh's key colors for the season.

Paul Casey (Nike Golf)

Literally and figuratively, Paul Casey may have the coolest range of polos at the U.S. Open. The Nike MM Fly UV Reveal Polos not only provide protection from the sun and heat, but the technology also reveals underlying color across the shoulder when the fabric is stretched.

Billy Horschel (RLX Ralph Lauren)

I'm not sure who is going to win the U.S. Open, but from a fashion standpoint, Billy Horschel is the leader in the clubhouse. Horschel finds himself on point in bold stripes, eye-catching color blocked designs, and trendy floral and gingham patterns. The key to Horschel's sartorial success is that he limits the number of statement pieces to one per outfit. Thursday's polo is a special commemorative piece to celebrate Ralph Lauren as the Official Outfitter of the USGA & U.S. Open.

Justin Thomas (Polo Ralph Lauren)

Justin Thomas is taking a page out of Billy Horschel's stylebook with bold trousers (pink on Friday and floral on Sunday) and a commemorative color blocked polo on Thursday. This is another sharp script that Ralph Lauren has put together. Not only is the brand outfitting brand ambassadors Thomas and Horschel, it is also outfitting USGA Committee members, staff, and more than 5,000 volunteers. It sounds like a lot of stylish people will be walking around Oakmont.

Danny Lee (Devereux)

Danny Lee proves that you don't need to wear daring patterns and high-octane colors to make a statement. His collection of simple, sophisticated, and stylish polos will be turning heads thanks to modern details, razor-sharp fits, and a red, white and blue color palette. On the weekend, Lee will give us a preview of Devereux's new Americana Collection with a two-tone chest stripe polo on Saturday and a smart solid red polo on Sunday.

Bubba Watson (Oakley)

The new Lowers Polo from Oakley takes center stage on Friday and Sunday. The combination of camo, wide stripes, and thinner diagonal stripes could make for a busy look, but the tonal nature of the patterns helps to keep it in check. Look for Bubba to be a bit more subdued the other two days with a heathered gray polo and a solid cobalt blue shirt.

Louis Oosthuizen (Ping Golf)

Ping has excelled at injecting classic looks with contemporary details and sharp tailoring in its new collection, and Oosthuizen's script showcases these qualities. The engineered stripes in the opening round and the color-blocked design in the final round are distinctly modern, while the selections for the second and third rounds are clean and timeless.

Webb Simpson (Izod)

Aqua and navy blue is a great combo for summer, and Simpson's script is loaded with the two colors. If you are looking for a couple of pieces to add to your wardrobe, you can't go wrong with the striped belt or Sunday's polo.

Harris English (Peter Millar)

I really like how Peter Millar has infused some trendy prints and styles into classic looks for Harris English. The bright colored trousers bring an energetic vibe to the course, the 6-pocket styles offer a casual feeling, and the prints on the polos provide a subtle texture.

Brandt Snedeker (Peter Millar)

Sneds will be striping it in this range of polos and belts from Peter Millar. Like English, he will sport the brand's new 6-pocket pant with a modern fit, a chino weight and a hint of stretch. How about the spectrum of colors, too? Guava, parrot green, and midnight. Two thumbs up.

Bill Haas (Peter Millar)

Sunday's look is that of a winner. The pin dot polo offers a modern elegance and the all-over microprint brings an added dimension to the solid pants. The striped ribbon belt is a great lightweight option for summer and it provides a cool nautical vibe.

Robert Streb (PGA TOUR Apparel)

This is a very patriotic script for Streb that features red, white and blue on three of the four days. Thursday's polo offers a bit of a retro feel with the tipped collar, coordinating chest stripe and contrasting sleeves. My favorite shirt of the bunch, though, is Saturday's red polo with diagonal stripes. It brings some serious energy to Moving Day, and the design will help Streb to stand out without being over the top.