Sports columnist Mike Preston gives his evaluation of key positions and what he observed during the Ravens first day of practice with pads. (Kevin Richardson/Baltimore Sun video)

Right guard Marshal Yanda struggled with a shoulder injury most of last season but it doesn’t appear to be a problem through the first two days of training camp.

Yanda doesn’t take a play off. He plays at full tilt through every play and every drill. He has been playing like a man who has something to prove.

--Cornerbacks have been more physical in this training camp compared to previous ones. During one play, Jimmy Smith never allowed receiver Deonte Thompson to get off the line of scrimmage.

It was a great play by Smith. As for Thompson, in the NFL a receiver should never allow himself to be prevented from getting into his route.

--I’ve been impressed with backup running back Bernard Pierce. The West Coast offense is designed for a downhill runner like him and he has shown some burst to the outside. He didn’t have that at all last season.

Rookie Lorenzo Taliaferro also has that type of ability of being able to hit the hole, square his shoulders and get through the line of scrimmage.

--I can’t wait for the hitting to start. The Ravens have been using second-year fullback Kyle Juszczyk as the lead blocker on short-yardage running plays.

The team tried this early last season, and Juszczyk kept getting stuffed. We’ll now get to see whether that year in the weight room has made a difference.

--Someone needs to tell rookie QB Keith Wenning he can’t pat the football in this league when dropping back to pass. If you pat it, you eat it.

Starter Joe Flacco had to learn that, too.

--Overall, the second day was not good for the offense. The Ravens had a lot of illegal procedure penalties, and the group looked tired.

Fatigue shouldn’t be a problem on day two.

--One player who did have a good second day was wide receiver Torrey Smith. He dropped a couple on opening day but got his groove back Friday.

I look forward to seeing him team with veteran Steve Smith.

--LaQuan Williams always seems to make plays in practice and during preseason games, but is never consistent enough to keep a regular spot on the roster.

Entering his third season, the former Maryland receiver should be ready to step up. He has made several plays so far.

--The Ravens signed former New York Giants safety Will Hill, who has been suspended three times for violating the NFL’s drug policy, including having to sit out six games to start this season.

He’ll fit in fine on the current Ravens roster.