You begin by using the present tense runs and then change to a past participle placed.
Use of the present tense to report an event that has already taken place is often used by English journalists. Following this style you would say:
He runs the marathon in 4 hours, taking 200th place.
If you were writing a more formal report, you would say:
He ran the marathon.....taking 200th place or
He ran the marathon.....and was placed 200th
Hope this helps.
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