Learn Spanish (Latin America): El análisis confirmó el dopaje del atleta. - The analysis confirmed the athlete's doping.

Atleta is an invariable noun, meaning the word itself doesn't change endings to show gender. Since the sentence refers to a male athlete, it uses the masculine article el, which merges with the preposition de to form the contraction del. If the sentence were about a female athlete, it would be de la atleta.

Is dopaje just the English word "doping" adapted into Spanish?

Yes! Spanish often adapts foreign sports terms by attaching native suffixes. Here, the suffix -aje is added to the root of the English word "dope" to create dopaje. You might also hear the direct loanword el doping in Latin American sports coverage, but dopaje is the formally correct term.

How do you make a word like análisis plural?

The spelling of análisis actually doesn't change at all in the plural. Because the word ends in -s and the stress does not fall on the final syllable, it remains exactly the same. To show that you are talking about multiple analyses, you only change the article: los análisis.

If I wanted to add a result, like "Consequently, he was disqualified," how would I use this lesson's connectors here?