Almost three months later, as the club gathers Monday at RFK Stadium for the start of training camp, Olsen and United have remained true to their word.

Of the 29 rostered players last fall, as many as 22 could return this season. The seven departures featured no regular starters and two notable contributors. All three trades were minor, with no players acquired.

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The incoming gang will feature one to three draft picks, a forward loaned from a Costa Rican side and two late signings: MLS free agent forward Sebastien Le Toux and homegrown midfielder Ian Harkes.

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The latter acquisitions are in the process of being finalized. Le Toux, 33, recorded 57 goals in eight years with five clubs (Philadelphia twice), while Harkes, a Gonzaga High School and Wake Forest graduate, won the Hermann Trophy this winter as college soccer’s best player.

Le Toux totaled three goals and seven assists in 32 appearances for Philadelphia and Colorado last year. (His acquisition was first reported by SB Nation’s BlackandRedUnited.com.) Harkes, 21, agreed in principle to a contract last week.

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Otherwise, United, as promised, has stayed the course, poised to build on a squad that meandered through much of the 2016 campaign before embarking on a late-season tear and falling to the Impact in a single-game playoff.

In the international marketplace, D.C.’s lone move was acquiring Jose Guillermo Ortiz on loan from Costa Rica’s Herediano. He made his national team debut at Copa Centroamericana this past week.

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The roster inactivity is not solely by choice. United will continue to have one of the league’s smallest payrolls until the stadium at Buzzard Point (slated to open sometime in 2018) creates fresh revenue streams and provides the financial muscle to, as several other MLS clubs have done, sign pricier players from overseas.

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For now, Olsen and General Manager Dave Kasper will continue squeezing all they can out of affordable veterans and young prospects while fostering tranquility in the locker room and harmony on the field.

Perhaps the two most important offseason acts did not involve players arriving or leaving, but staying.

United purchased the contract of Argentine playmaker Luciano Acosta, whose loan from Boca Juniors expired after last season. The club also locked U.S. national team defender Steve Birnbaum into a long-term deal; his previous pact was to expire after this coming season, which would have freed him to sign overseas without the club collecting a transfer fee.

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Birnbaum and defender Taylor Kemp are on national team duty for one to two more weeks. Ortiz will also arrive at camp late. Goalkeeper Bill Hamid underwent minor knee surgery last week — the second consecutive winter on the same knee — and will miss most, if not all, of training camp.

Attacker Chris Rolfe’s future remains unclear. Concussion issues have sidelined him since late last spring. If he retires, United would gain a roster slot and then have to decide whether to buy out his guaranteed contract with its own money (as opposed to MLS’s) in order to recoup about $275,000 in salary cap space.

United will spend most of the next six weeks on Florida’s west coast, first in Bradenton, then in Clearwater, with a week in Washington in between. Six friendlies are on the calendar. The season opener is March 4 against Sporting Kansas City at RFK.

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With few personnel changes, Olsen’s roster options are straight-forward. Hamid’s absence thrusts Travis Worra into the starting role. Birnbaum, Kemp, Bobby Boswell and Sean Franklin are the backline incumbents, with converted midfielder Nick DeLeon and first-round draft pick Chris Odoi-Atsem (DeMatha, Maryland) as options on the right corner.

Lloyd Sam, Patrick Nyarko and 2016 top scorer Lamar Neagle are the primary options on the wings. Ortiz will challenge Patrick Mullins for the striker’s job, with Le Toux and Alhaji Kamara in reserve.

Marcelo Sarvas is the first-choice defensive midfielder, but at age 35, Harkes is waiting in the wings. Harkes could also challenge Jared Jeffrey and Rob Vincent for playing time in an advanced central role aside Acosta.