Looks like Powell better start playing like he did last year in summer league, or he could possibly lose out on his roster spot. Which I'm thinking more and more everyday will happen(just because of Pops). I think Rawle is safe, because of Griff's departure and our need for a backup swing. And the players highlighted play the same spot as Powell. Also, notes who we are looking at for third pg. <div class='quotetop'>QUOTE </div><div class='quotemain'>SALT LAKE CITY - Rawle Marshall and Josh Powell are feeling the pressure.And they don't mind one bit.Fresh off whirlwind rookie seasons, the former undrafted free-agent forwards have begun the early stages of Year Two on the summer league team and are uncertain whether their careers with the Mavericks will continue.Both have nonguaranteed contracts for the upcoming season. They aren't counting on last season being an inside track at sticking with the defending Western Conference champions."I've got a year under my belt and I'm trying to work on areas of my game," Marshall said Thursday night after the Mavs beat San Antonio 90-81 at the Rocky Mountain Revue."It was like this last year. I'm always trying to prove myself. Last summer, I was trying to get in this league. All I can ask for is a chance to play and show people what I can do."Marshall, 24, played in 23 games last season, starting nine at small forward, while shuttling between the Mavs and D-League affiliate Fort Worth. Powell, a 23-year-old power forward, saw action in 37 games and, unlike Marshall, was on the playoff roster."No matter what the situation is, you've got to stay hungry," said Powell, who started and had four points and seven rebounds against the Spurs."I know sometimes it may not look like it, the stats may not show it, but I work on my game every day. I come to play and give it my all."Harris' status uncertainContract negotiations with assistant coach Del Harris are ongoing, but his return has yet to be finalized. Harris' contract expired shortly after the NBA Finals.With the decision not to bring back assistant Charlie Parker, Harris would be the team's longest-tenured coach. He joined former coach Don Nelson's staff during the 1999-2000 season.Camp hopefulsThough decisions have yet to be made on training camp invitees, free-agent forwards Jackson Vroman and Pops Mensah-Bonsu have opened some eyes with their play.President of basketball operations Donnie Nelson referred to Vroman (6-foot-10, 220 pounds) as a "poor man's Eddie Najera." Vroman has been in the league two years and spent last season with the Hornets.Mensah-Bonsu (6-9, 240) is a shot blocker who averaged 12.6 points as a senior last season at George Washington. Vroman and Mensah-Bonsu will probably compete with Josh Powell for a roster spot.BrieflyFirst-round draft pick Maurice Ager scored 24 points in the Mavs' win over San Antonio. Ager was 7-of-14 from the floor.Fort Worth Flyers coach Sam Vincent and former Mavs forward Popeye Jones are assistants for summer league coach Joe Prunty, a Mavs assistant.The Mavs remain interested in signing Chucky Atkins as a possible third point guard. Using free agent Keith Van Horn in a sign-and-trade remains a possibility.</div>