Seattle is also expected to add Obafemi Martins, a Nigerian forward.

Goalkeepers (3)

1 Michael Gspurning: Quickly established himself in 2012 as a fan favorite and one of the best goalkeepers in MLS.

24 Marcus Hahnemann: Seattle native and former lower-leagues Sounder returns home and has proved to be a more-than-able backup.

29 Josh Ford: Holds the No. 3 role going into his third year.

Defenders (11)

34 Jhon Kennedy Hurtado: Former MLS all-star and defender of the year finalist will be called upon to anchor the back line.

4 Patrick Ianni: Suffered a foot fracture in a preseason fitness drill and could be out a few more weeks.

12 Leo Gonzalez: Tough, physical play from the Costa Rican makes him the team’s top defensive option at left back.

5 Adam Johansson: Swedish international adept at jumping into the attack from the right flank.

20 Zach Scott: The last remaining player among the lower-league Sounders who made the leap to MLS. Can play every position in the back.

8 Marc Burch: Converted forward who brings more of an attacking flair to the left-back position.

30 Andrew Duran: Was limited for most of preseason coming back from a knee injury suffered midway through his rookie season.

2 DeAndre Yedlin: The team’s first homegrown signing is expected to be the future at right back. Doesn’t turn 20 until July.

22 Eriq Zavaleta: Generation Adidas signing out of Indiana might also see some time at forward.

33 Dylan Remick: Versatile rookie impressed throughout preseason to earn a contract. Former track athlete can play all over the field.

50 Djimi Traore: Experienced veteran from Europe is already a hit in the locker room and could contend for a starting position.

Midfielders (11)

6 Osvaldo Alonso: Three-time team MVP is undoubtedly one of the best players in the league, having been named to the 2012 MLS Best XI.

10 Mauro Rosales: A designated player who has had 13 assists each of the past two years but has struggled to stay healthy for the playoffs.

11 Steve Zakuani: An exciting player who is all the way back from a devastating leg injury that kept him out most of two seasons.

3 Brad Evans: U.S. international who is starting to embrace a utility role that has already seen him play nearly every position.

15 Mario Martinez: The Honduran star joined midseason last year and has already shown an ability to score breathtaking goals.

21 Shalrie Joseph: Eight-time MLS all-star was acquired in a shocking trade just weeks before the season. One of the team’s three DPs.

13 Christian Tiffert: Another DP, but he’s expected to be bought out before the start of the season. Hasn’t been with the team for weeks.

27 Lamar Neagle: Federal Way product returns for his third stint with the Sounders after a year with the expansion Montreal Impact.

25 Andy Rose: Fell to the supplemental draft in 2012 but ended up having one of the great rookie seasons for a Sounder.

14 Alex Caskey: A pleasant surprise from last year, had a strong preseason again this year with two goals.

23 Servando Carrasco: A tenacious defensive option in the Alonso mold. Known also for dating U.S. women’s team star Alex Morgan.

Forwards (4)

7 Eddie Johnson: Set a franchise record with 14 regular-season goals in 2012. Many think he could lead the league in goals this year.

26 Sammy Ochoa: Physical presence scored eight goals in all competitions last season, which was third-best on the team.

16 David Estrada: One of the breakout stars early last year (five goals) before missing a few months with a broken foot.

19 Babayele Sodade: Posted a goodbye to Sounders fans on Twitter earlier this week, but the team has yet to announce anything regarding his status.

Joshua Mayers