The

introduced four of their most recent player additions to the team's Major League Soccer roster Wednesday.

Portland fans received their first look at midfielders

and

, along with defenders

and

. The four were among the seven players the Timbers acquired after a flurry of expansion drafts and trades two weeks ago.

"All of these players have a chance to make a big contribution to our team," Portland coach John Spencer said while sitting on a chair inside the Timbers' new team store in downtown Portland.

The latest additions bring the Timbers' roster total to 11. The Timbers had previously signed three players (

,

,

) from the 2010 squad and signed

from the second-division Austin Aztex in October.

While leaving their previous teams was difficult, each of the players said they were excited about the opportunity for a fresh start with a new team.

"Columbus had a good atmosphere, but I think this is going to be even better," said Brunner, who played for the

last season. "We're fortunate to be in a city that has the drive and passion for soccer. A lot players don't get that during an expansion year, but we've got it before the season has started."

All four players have MLS experience, though not much. The four players have a combined total of 12 years of MLS experience, but the number of appearances in actual games is slight. Spencer is hoping the combination of experience, hustle and potential will be enough to achieve positive results in 2011.

"These guys have played in 140 MLS games," Spencer said. "And they all have a big, big upside."

Wallace, 22, comes with a little bit of name recognition. The defender/midfielder arrives in Portland knowing that the Timbers acquired him after trading Dax McCarty, the top pick in the overall expansion draft, to

.

"As a player, you want to go to a club that wants you. You want to step into a situation that you feel comfortable in," Wallace said. "This is something big and a challenge, but I'm ready to take on the challenge."

Wallace is also looking forward to reuniting with former college teammate

. The two played two seasons together and won a national championship at Maryland in 2008.

"We're looking forward to getting that partnership again," Wallace said.

Another combination that could prove productive for the Timbers is Moffat and Brunner. Moffat and Brunner were teammates on the Crew for the past three seasons.

"It's good to come somewhere new and have someone I know here," Moffat said. "We know how to encourage one another and how to get on each other. I'm glad we're both doing this experience together."

Moffat, a midfielder, finished his fourth season in MLS, playing in a career-high 24 games (23 starts) and scoring two goals with one assist in 2010. The 24-year-old Brunner, a third-year defender, played in 14 games (13 starts) with the Crew in 2010.

"We roomed together on road trips," Brunner said. "He knows what to expect from me on the field."

Lowry, 25, is a combination forward/midfielder, and reached a career-high in playing time 1,004 minutes in 15 games (12 starts) with the Chicago Fire.

Notes:

The Timbers will unveil their 2011 MLS jerseys Thursday morning during an event at Portland International Airport. ...Portland head coach John Spencer has announced the members of his coaching staff for the upcoming Major League Soccer season. Assistant coach Amos Magee and goalkeeper coach Adam Smith were retained, while Spencer hired Trevor James as the new assistant coach. James, 49, comes to the Timbers after spending the previous five seasons with the Los Angeles Galaxy. Magee, 39, finished his second season as an assistant with the Timbers in 2010. Smith, 39, joined the Timbers as the goalkeeper coach in 2010. ...The Timbers did not select a player during Stage 1 of the league re-entry draft held Wednesday. Stage 2 of the draft is scheduled for Dec. 15.