Joe Calzaghe. He didn't put all his power into punches later in his career because of the hand injuries he was prone to.
Eddie Perkins - with only 21 KOs in 99 fights one would think he couldn't punch. But like Griffith and Charles, a number he did on an opponent had an effect on him. In Perkins' case it was when ke KOd Takahashi in the 13th round in Japan. Fortunately he only suffered a concussion but Perkins later said he didn't go out as hard anymore and stuck to boxing. It's not like he couldn't produce the goods anymore, such as when he turned up the heat to a severe degree against Johann Orsolics, but it did appear to be curtailed.
Roy Jr’s career KO percentage is still 71%, which is amazing considering he fought up several weight divisions and also well past his sell-by date in the most ill-advised career extension possibly in boxing history.
I think quite a few fighters have this problem with not putting all their power into punches...it is difficult to make a tight fist and punch fluidly is another issue many have. Michael Nunn was deceptive KO% wise as well...he sparked Kalambay with 1 shot but that was rare for him and it probably was a tightly closed fist because it was the first round where fighters are feeling each other out and testing each other
Chris Eubank Jr had power when needed but usually did enough to win on points. No doubt the Watson tragedy effected him like Emile Griffith and Ezzard Charles.
Maske could pulverize bones. The force of his shots, so Teutonic in their placement and trajectory, traveled deep into tissues and did damage that lasted a lifetime.
I’ll nominate “Joltin’” Jimmy Young as my man @My dinner with Conteh likes to call him. Deceptive in so far Jimmy even managing 11 KOs during his career - maybe a few of them fell asleep mid fight- which suggests another possible moniker for Mr Young - “Lullaby” Jimmy?
Bob Satterfield and Turkey Thompson. Two absolute monster punchers, who finished their careers with a low KO%. Why? Because your KO% falls off very rapidly, when you fight the best opposition.
Ron Lyle. The only man to drop foreman twice with pure power alone only had a knockout percentage of 60%
@William Walker once turned me onto the second fight between Johnny Bratton and Rocky Castellani. It was an excellent contest but it wasn't what I was expecting when it came to Castellani. Having seen his record over the years I was pretty sure he was a boxer with his mere 18 KOs in 69 wins. Even though he did drop Sugar Ray Robinson for the count of '9', I thought that was just a fluke. But when I saw the Bratton fight I changed my tune. Rocky was a clubbing type of puncher and an incredibly good infighter but probably just missing that final snap on his punches. But there was nothing boxer about him. The dude was rough.