Unhealthy
Not Healthy
noun, な adjective
If 健康 is "health," then something that is not this is unhealthy.
ふけんこう
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well. Will help to know 健康 first.
不健康な野球選手についてのテレビ番組は、全国放送される予定ですよ。
The TV show about unhealthy baseball players will be broadcasted nationwide.