der Jogger
jogger
A person who runs at a slow, steady pace as a form of exercise.
Jeden Morgen laufen mehrere Jogger ihre Runde durch den Park.
Every morning, several joggers do their lap through the park.

jogger / joggers
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jogger
A person who runs at a slow, steady pace as a form of exercise.
Jeden Morgen laufen mehrere Jogger ihre Runde durch den Park.
Every morning, several joggers do their lap through the park.

You can tell whether the person or the pants are meant from the verb. If the 'Jogger' (jogger) performs an action, e.g. runs or sweats, it is the person. If the 'Jogger' is worn or has a quality, e.g. is comfortable, it is the pants.
Ein Jogger läuft jeden Abend durch den Wald.
A jogger runs through the forest every evening.
Using 'der Jogger' for a pair of pants is colloquial. In a more formal context or in a store, people would be more likely to say 'Jogginghose' (sweatpants).
Für den Flug ziehe ich mir einfach einen Jogger und ein T-Shirt an.
For the flight, I'll just put on joggers and a T-shirt.
The word 'Jogger' belongs to the word family around the verb 'joggen' (to jog). This also includes 'das Jogging' (jogging, the activity) and 'die Jogginghose' (sweatpants, the clothing).
Viele Jogger treffen sich am Wochenende im Stadtpark.
Many joggers meet in the city park on weekends.
runner / runner rug / bishop
'der Läufer' and 'der Jogger' can both mean a person who runs. However, 'der Läufer' is more general: it can be someone who runs as a sport, including quickly, regularly, or in a race. 'der Jogger' more often means someone who jogs at an easy, steady pace, often in their free time. Learners may confuse the words because both have to do with running. When talking about sports in general or a race, 'Läufer' fits better. When talking about relaxed jogging in the park, 'Jogger' sounds more natural.

Im Park läuft jeden Morgen ein Jogger langsam am See entlang.
A jogger runs slowly along the lake in the park every morning.
Der Läufer hat den Stadtlauf in weniger als einer Stunde geschafft.
The runner completed the city race in less than an hour.