Robert Turbin turned the corner and took off down the sideline, showing impressive speed on one of the longest runs of the day. Then, for good measure just as the play was ending, the fourth-year running back dropped a shoulder and knocked an unsuspecting defensive back off of his feet. That and more in today's version of Seahawks training camp observations:

1. Turbo's hip is fine

Turbin missed offseason workouts while recovering from hip surgery, and was eased back into action the first couple of days of camp, but fours day in, it's clear that the player known as Turbo is functioning at full speed. On the play mentioned above, and several other nice runs, Turbin showed impressive burst, and thanks to the Seahawks now being in pads, the 222-pound back was also more than willing to initiate some contact.

Turbin's three-year career has been a bit overshadowed by the presence of Marshawn Lynch, one of the NFL's best backs, but his contributions to Seattle's offense have been big. After being banged up at times last season, Turbin looks healthy and fast, and should again be an important part of the offense, not just as Lynch's backup, but as a third-down back and lead back in the two-minute offense.

2. Seisay looks the part

One practice is way, way too small of a sample size to judge a player, so we don't yet know how Mohammed Seisay will do in Seattle, but what was evident in the cornerback's first practice with his new team is that Seisay certainly looks like a Seahawks cornerback. Seisay, who came to Seattle in a trade with Detroit on Sunday, measures 6-foot-2, 202 pounds, and perhaps more significantly for a Seahawks corner, has very long arms. As you might expect for a new cornerback, Seisay got beat a few time in practice, but also used those long arms to break up a couple of passes. As has become the custom for a cornerback new to Seattle, Seisay was coached-up not only by his actual coaches, but by Richard Sherman, who goes out of his way to help young or newly-acquired players learn Seattle's coverage techniques.