Former NFL player and scout Bucky Brooks is spotlighting the prospects who make a mark -- for better or worse -- at the Yovani Gallardo Jersey 2016 NFL . On Friday, the offensive linemen and running backs took the field. Here are Brooks' impre sions from Indianapolis:Winners: The Hoosiers' standout is squarely in the first-round conversation after displaying exceptional speed and athleticism on the turf. Spriggs clocked the best 40 time among offensive linemen (4.94) and flashed ballerina-like quickne s during drills. He easily executed turns and transitions during positional drills. Most importantly, he showed good balance and body control shuffling laterally on the kick-and-slide and mirror drills. Given the number of teams in need of a pure left tackle, Spriggs' performance certainly could make him a Day 1 selection in April. : The former walk-on surprised scouts with his athleticism, balance and body control. He showcased exceptional agility and movement skills in bag drills, while also displaying light feet and swivel hips in change-of-direction drills. With Conklin also posting a 5.00-second time in the 40-yard dash and showing short-area explosivene s in the agility drills, Friday was a fine day for the Jonathan Villar Jersey Michigan State product.: After living in 's shadow in Tuscaloosa, Drake is suddenly in the spotlight following his strong performance on the Lucas Oil Stadium turf. He posted back-to-back 4.4s in the 40 and flashed exceptional balance, body control and burst in positional drills. Drake looks like a third-down back with the potential to make immediate contributions as part of a diverse RB rotation. Losers: Collins was slotted as the third running back on most boards heading into the combine, but a lackluster showing on Friday could put his position in peril. Collins showed minimal explosivene s in athletic drills (28.5-inch vertical jump, 4.59-second 40-yard dash) and struggled snagging pa ses during positional drills. He appeared to Josh Hader Jersey fight the ball as a pa s catcher, and it is hard to envision him making a strong contribution to any team's pa sing game. Considering how offensive coordinators covet a dynamic multi-purpose back, Collins' limitations in the aerial attack could sink his value on draft boards around the league.: The LSU standout was expected to make a jump up the charts following a strong performance at the combine, but his disappointing showing could Brandon Woodruff Jersey lead to a bit of a drop instead. Alexander appeared heavy-legged in positional drills and his pedestrian 40 time (5.57) will lead scouts to question his ability to play on the outside.: The early entrant was a bit of an unknown commodity heading into Indy, but his legacy (as Fred Taylor's son) fueled expectations of a strong performance this weekend. However, Taylor didn't deliver the goods with a poor 40 time (4.60) and a lackluster showing in drills (too many dropped pa ses), leading to more questions about his fit as a feature back.Biggest subplot entering Saturday's workoutAll eyes will be squarely on the -vs.- competition that will take place on the turf during quarterback drills. With several teams undecided on the consensus No. 1 prospect at the position, the throwing drills could determine which signal caller heads into the pro-day circuit as the top dog on most boards. Thus, scouts will scrutinize every dropback and throw to determine which prospect po se ses the arm talent to merit consideration as the ultimate franchise quarterback. Scouts also will pay close attention to the wild cards at the position. Are and worthy candidates to be development prospects? Both are considered strong-armed throwers with A- Paul Molitor Jersey plus arm strength and talent, but inconsistent accuracy, ball placement and judgement have torpedoed their respective draft stocks heading into the combine. With a strong performance on the turf, however, both guys can change the narrative and enhance their value as potential Day 2 picks. Follow Bucky Brooks on Twitter .