How old should a boxer be to be tested in high level matchups?

Mid 20s and up.

What I've been reading in this forum for years is 25 and under are still treated "still young" doe. There's no "depends." The "depends" part depends on who you are asking the question to. Generally, they're still babies and don't need to be rushed. To me it goes back to my other thread, Why is losing so horrible in the sport of boxing? If you lose once, it's over. It doesn't allow for any possibility of making any improvements in your game or the thought of gaining experience after the fight. You're not allowed to have a chance to recover from the loss.

What I've been reading in this forum for years is 25 and under are still treated "still young" doe. There's no "depends." The "depends" part depends on who you are asking the question to. Generally, they're still babies and don't need to be rushed. Canelo fought the number one guy at 23, so there has to be a "depends."

There’s no absolute formula. Every fighter is different. this is right on

I'd say 20, 21 should begin the next phase of a boxers career. Gotta build the brand, as they say. Maximize the money earning potential. A nobody fighting for a title or a somebody fighting for a title makes all the difference.

Still think they are doing horrible job with Brandun Lee. He should be attempting to fight recognizable names that will push him into stardom, PBC/Showtime have Robert Easter Jr, Omar Juarez, Gary Antuanne Russell, Barthelemy, Rolly Romero, Michel Rivera, Elvis Rodriguez, Sergey Lipinets and Batyr Akhmedov. ​ Same with Jaron Ennis. Sergey Lipinets current achievements are beating a shot Lamont Peterson, a shot Omar Figueroa and having a draw with Custio Clayton. Knowing this, I am not sure how Sergey Lipinets would had faired against David Avanesyan considering Sergey is in actuality a 140 pounder. Also find it odd that people instead of assessing that Ennis just had difficulty making adjustments against a unrecognizable style after a long year of inactivity, make Karen out to be this mythical figher. Karen is currently 26 years old so it be unfair to dismiss him from beating noteworthy opponents, but so far, he himself hasn't competed at the top level excluding his fight with Ennis. It be bizarre to state that he beat any other top contender besides boots based on one performance in which he lost.

After 3 years as a pro There’s still no absolute formula. Every fighter is different.

There’s no absolute formula. Every fighter is different.

completely dependent on the fighter. Back before the 2000s, it was common place for guys to be seasoned contenders/titlist by 23.... Then you have your K9 Bundrages, Stevensons, Hopkins, and Beterbievs having high level matchups and winning!

What I've been reading in this forum for years is 25 and under are still treated "still young" doe. There's no "depends." The "depends" part depends on who you are asking the question to. Generally, they're still babies and don't need to be rushed.

Depends. What age did you turn pro? Experience has to be taken into account as well, depending on how you're matched up as your career progresses or what your amateur background is like. There's a higher sense of urgency if you turn pro later of course to step up the competition soon. If you turn pro really young, you can obviously take your time some more. Ennis should be fighting the top of the division, I believe. But that may not entirely be his fault.