SAN DIEGO, Calif. -- Preseason game No. 2 kicks of tonight at Qualcomm Stadium against San Diego Chargers and for some players their time to make an impression is running out.

Here is a look at five guys to watch:

Alex Albright – He was everywhere against Oakland on Monday, credited with a game-high nine tackles, and he will start tonight because of DeMarcus Ware’s absence due to a slight hamstring strain. Albright is a virtual lock to make the team, but he can show he can be a regular contributor on the defense with a good performance. He will also play some inside linebacker again, which would help the team’s ability to carry more players at other positions when they make the final cuts.

Mario Butler – After a so-so offseason, Butler has done much better when the pads came on. He is not the fastest or quickest, but he has a knack for being in the right spot at the right time. He understands his limitations and stays out of trouble. He can play in the slot some and has taken some turns at safety. As the Cowboys ponder how many corners and safeties to keep, Butler could be that swing guy the way Alan Ball was a swing guy for a few seasons.

Ronald Leary – He came in with a lot of acclaim as an undrafted free agent but he has leveled off over the last week of camp. Against Oakland he tired and did not fire off the ball as well as he had been earlier in camp. The Cowboys have guaranteed him $214,000, a high number for an undrafted player, so he should make the team, but with a good showing tonight he could still work his way into the starting lineup or at least one of the active offensive linemen on Sundays.

Kevin Ogletree – Nobody likes hearing this but Ogletree has had a nice camp. Of the guys competing for the No. 3 receiver spot he has the most ability to play as a starter should something happen to Miles Austin or Dez Bryant. He does not help much on special teams but if he can prove to be reliable and make plays regardless of the quarterback tonight, he can cement a spot on the roster. Even with Andre Holmes good outing vs. the Raiders, Ogletree is still the leader for the No. 3 spot.

Mana Silva – He was a late-season pickup in 2011 after he was signed of Buffalo’s practice squad and had four special teams’ tackles. He had an interception to clinch the win at Oakland on Monday and Rob Ryan is intrigued about this prospect. Silva, however, will need to make his mark on special teams to make a dent because the Cowboys still like Matt Johnson’s potential even though the fourth-round pick has taken part in one full-padded practice in camp.