Here are some quick notes on the second practice with the Niners:

– Cornerback Nnamdi Asomugha missed the second practice and coach Lane Kiffin said the cornerback was getting IVs and having trouble keeping down food. His status for Tuesday’s single session at 3 p.m. is uncertain.

– Stayed with the defense for most of the evening session, with the general consensus being they didn’t do quite as well under the lights as they did in the morning.

One player who did have a coming out party of sorts was defensive end Trevor Scott, the sixth-round draft pick out of Buffalo. While it’s sometimes difficult to tell because linemen must pull up before they get to a quarterback, Scott tortured 49ers reserve left tackle Joe Toledo.

With a quick first step, Scott twice got past Toledo while barely being touched for what could have been sacks of quarterbacks J.T. O’Sullivan and Alex Smith and also had a pressure which resulted in an incomplete pass.

Scott earned himself a hug from line coach Keith Millard and a pat on the back of the helmet.

Together with outside linebacker Jon Alston, Scott later forced Toledo into false start with a line stunt.

– Linebacker Robert Thomas, getting his turn for the third straight day as the first-team strong side linebacker, intercepted an O’Sullivan pass intended for Dominique Zeigler.

– Cornerback DeAngelo Hall was scorched for a pair of touchdown passes by Smith to Jason Hill, one on a corner route to the left and another on a fade pattern to the right. Later, wide receiver Robert Ortiz got open over the middle against Hall but Smith’s pass sailed high.

– Safety Tyvon Branch delivered what may have been the hit of the day, laying out De La Salle High School product Cameron Colvin at the goal line _ probably a bigger hit than coaches for both teams had in mind but one that gave a hint of the hitting ability Branch was reputed to have at UConn.

Branch also broke up a pass.

– Defensive tackle Gerard Warren came up with a juggling interception after Thomas Howard deflected a Smith pass over the middle by Smith intended for Josh Morgan. Howard also pounced on a poor throw from a pressured O’Sullivan for what was close to being a lateral.

– Wide receiver Javon Walker did not practice in the second session. Kiffin said the Raiders changed their original plan to have him practice twice Monday since he had practiced twice on Saturday. Also sitting it out were Derrick Burgess, who is having stomach issues. Others who didn’t participate were Terdell Sands, who was scheduled to be off, quarterback Andrew Walter (tired arm), cornerback John Bowie (knee), safety Greg Wesley (back) and defensive tackle Tommy Kelly (scheduled day off).

– Forty-Niners tight end Vernon Davis and Raiders defensive end Kalimba Edwards got into a brief scuffle that was broken quickly broken up.

– Strong side linebacker Sam Williams collapsed his side of the 49ers line in making a stop on an attempted sweep by 49ers running back Thomas Clayton. The 49ers rested Frank Gore, their feature back, during team sessions.

Williams was running with the second team along with Edgerton Hartwell in the middle and Alston on the weak side, with Ricky Brown, who was getting first-team reps last week, running No. 3.

– Cornerback Michael Huff, who has been making more plays as a free safety than he did as as strong safety, seemed to be arriving a step late on most plays against the 49ers offense.

– Left tackle Kwame Harris pancaked former teammate Ray McDonald during team drills, while Robert Gallery was worked over on his turn by Justin Smith.

– Running back Darren McFadden broke free and pulled away from 49ers linebacker Patrick Willis on his most impressive run.

– What some sideline observers say has been a relatively calm camp for caustic offensive coordinator Mike Martz changed Tuesday night, with Martz railing at receivers who were incorrect on their reads while running their routes.

“It’s a corner (bleeping) blitz, what do you do,” Martz shrieked at Morgan.

– Wide receiver Arman Shields, who had a rough early session, caught a deep play-action pass from JaMarcus Russell over cornerback Tarrell Brown.

– Gallery, who has been virtually penalty free through training camp, was whistled for a false start. With the 49ers in town, the Raiders temporarily suspended their policy of having players run for penalties.