Wednesday’s lineup: Travis Worra; Jalen Robinson, Kofi Opare, Bobby Boswell, Chris Durkin; Rob Vincent; Lamar Neagle, Ian Harkes, Sebastien Le Toux, Jose Guillermo Ortiz; Alhaji Kamara. Most of the probable starters entered midway through the second half. Steve Birnbaum was given the day off.

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2. Big Bill is back. Five weeks after knee surgery, Bill Hamid made his preseason debut Wednesday by entering at the start of the second half during the 3-0 victory. Barring any setbacks, he seems certain to start the final friendly and the regular season opener. Worra proved his worth by starting five preseason matches in Hamid’s absence.

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3. Nick DeLeon appears to have solidified the starting job at right back. The midfielder-turned-defender started three consecutive preseason matches on the corner, then came on midway through the second half Wednesday with the other regulars. Speed, strength and league experience will have to compensate for rudimentary defensive instincts.

4. Jared Jeffrey seems to have fought off a challenge from Harkes to partner with playmaker Luciano Acosta in the lineup — Jeffrey was part of the main group Wednesday for the second consecutive match — but the homegrown rookie has displayed the skills and vision to gain substantial playing time this season.

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5. Has Boswell lost his starting job? It looks that way. Since Birnbaum returned from U.S. national team duty, Boswell has paired with reserve Opare in three consecutive matches. Birnbaum, meanwhile, has been working with Sean Franklin, a career right back whom Olsen is intent on converting to a middle man. Is the back line set in stone? No way. Boswell remains in the running, new signing Maxim Tissot will spell Taylor Kemp at times on the left and Franklin is available to return to his natural spot on the right. It’s a long season; Olsen will tinker and adjust when necessary.

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6. He may be 35 years old, but Marcelo Sarvas remains the first-choice defensive midfielder in a 4-1-4-1 formation. There was speculation that Harkes would become the natural successor, but Harkes is more comfortable in an advanced central role. Vincent, a versatile, blue-collar figure, is the backup.

7. Durkin, 17, is the real deal, a kid ahead of his time. The 2016 homegrown signing is comfortable on the ball and up to the speed of first-division soccer. Although he had spot duty at left back Wednesday — Tissot was in Canada finalizing his work visa — the real question is whether Durkin is next in line behind Sarvas. He’ll have a hard time cracking the lineup this year and probably will end up spending more weekends in Richmond with the USL’s Kickers than in Washington with United. Plus, he’ll have to serve under-17 national team duty. The future, though, is blindingly bright.

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8. With the wings and lone striker seemingly set, Neagle will serve as Olsen’s super sub in the attack. It’s easy to forget he was United’s leading scorer last year, with 10 goals. On Wednesday, starting with the second unit, Neagle crossed to Kamara for the first goal and dropped a lovely long ball over the top to Le Toux for the second. He’s too influential not to start on occasion.

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9. Neagle isn’t the only multidimensional attacker. Le Toux will play wide, up top or, as he did Wednesday, underneath the striker. Sometimes he’ll start. Ortiz was wide in the first half, up front in the second. The Costa Rican was striker Patrick Mullins’s replacement at halftime in each of the first four preseason tests.

10. No-doubt starters: Hamid, Birnbaum, Kemp, Sarvas, Acosta, Mullins, left wing Patrick Nyarko and right wing Lloyd Sam.