DeVante Parker
Parker emerged as a deep threat for the Miami Dolphins towards the tail end of the 2015 season. He will likely carry that success over into his sophomore season as head coach Adam Gase's offenses is predicated on moving skill players around the formation in order to create mismatches. Parker is participating in offseason workouts for the first time in two seasons and has certainly benefited by routinely going up against Byron Maxwell (who has performed admirably in OTAs and minicamp) and Xavien Howard. Parker will spend time in the slot this season as well and will cause mismatches from the slot position.
Jay Ajayi
Ajayi played last season at 230 pounds and is looking to play at around 218 pounds in 2016. Gase has lauded Ajayi for shiftiness that frankly most onlookers (including me) haven't witnessed. Ajayi knows that he must improve as a consistent pass catching threat if he hopes to be considered a feature back in Gase's offense. He's been working diligently to improve as a receiver out of the backfield, but it does not appear natural for him as he occasionally double catches instead of seamlessly bringing the ball and bringing it to his frame. Ajayi prefers to attempt to deliver contact and his new frame might not be conducive to him maintaining his current style of play.
Kenyan Drake
Drake's ability to run routes like a wide receiver will greatly benefit the Dolphins as he is capable of getting mismatches against NFL linebackers and safeties. It is very possible we could see him on the field at the same time as Ajayi which makes the Dolphins' offense that much more unpredictable. He can line up in the backfield and motion into the slot and vice versa. His position flexibility might be exactly what is needed in order to offset Ajayi's lack of experience catching the football vertically down the field. Drake might not be on the field for consecutive plays, but if his college film is any indication of his big-play ability, he shouldn't needthat many touchesto make an impact on the game.
Jordan Phillips
Phillips will be competing with seven-year veteran Earl Mitchell for the starting spot opposite of Ndamukong Suh. He showed flashes of what he was capable of last season but his coaches lamented consistency issues with him during his rookie season. During his final season at Oklahoma, many scouts believed Phillips was an exceptional talent, but noticed there was a dearth of effort from him play-to-play. Phillips has been working on his conditioning this offseason because he simply wants to be on the field more consistently in 2016. Phillips talent is palpable and he should beat out Mitchell if he has in fact improved his conditioning.
Xavien Howard
Howard had difficulty in college covering receivers with speed wide receivers in college, but he has been working diligently to improve upon his technique and so far he is getting the results he desires. There's a fine line between anticipation and patience for a defensive back and Howard seems to be walking that line rather well. When lined up against the likes of speed wide receivers such as Kenny Stills and Parker, Howard has more than held his own and has been able to stay with them stride for stride on deep patterns. He also has outstanding ball skills. If Howard continues to impress during camp, it is possible that he could go on to have a very good rookie season as the Dolphins starting left cornerback.
