Definition: played MLB for parts of 10+ seasons, and a creative writer can come up with some kind of story about them that sounds superficially good.
Jack Morris got in because he was arguably the best starting pitcher between Nolan Ryan and Roger Clemens (yes, they overlapped, shhh). Jim Rice got in because he was the most feared hitter in baseball among Fenway sportswriters. Harold Baines got in because everyone (except some other people) with 2866 hits is in.
So, sure, 40 wins and leading the majors in homers in the 2010s could get him a plaque. I don't even think you need the "goes strong for a few more years" qualifier. He's already better than Baines, and nobody cares about PEDs if you're nice. Only bitter, vindictive PEDs count against you.
I mean, it's all about what you mean by "ready." Manny was productive and not an all star debuting in his age 19 season. And it's not like he was dominating the minors. But he was clearly "ready" and had MVP votes in his age 20 season. If he had starred in the SEC instead of being below average at Frederick would that talent never have come through?
Adam Jones made the majors at 20 and again at 21, though he wasn't all that productive. But looking at his AAA stats he was probably ready...
Even Ryan Mountcastle probably could have hit adequately last year at 22.
So why shouldn't a 22 year old Rutschman or Kjerstad or Tork or Andrew Vaughn or Austin Martin be capable of holding their own in the majors? Yeah, it would be an adjustment, but a lot of these guys could figure it out and do ok. Not just any guys, but the top few are supposed to be the very best hitters in their class after all.
Again, this is not to say this would be the best way to develop them necessarily, and certainly is bad for service time, which is why it doesn't happen. But a handful of guys each year should be capable.
I'm actually curious if it will happen this year, in a year with no minors. Not in Baltimore, we haven't really shown that we would do that. But if Toronto somehow finds themselves contending, and if Austin Martin really has a 70 hit tool, why not have him be some kind of super sub? What if Pittsburgh is doing well and needs a DH, and in BP Gonzales really looks like the guy who OPSs over 1.000 everywhere he goes?
On this day in 1970, the Orioles lost to the Cleveland Indians 10-9. The Birds entered the bottom of the ninth trailing 10-6. They struck early with a Don Buford walk, a Frank Robinson single and a Boog Powell three-run homerun. After allowing the homer, Dean Chance struck out Paul Blair and induced Brooks Robinson and Davey Johnson to groundout to end the game.
Ray Fosse (2 for 4, 1 run scored, 1 HR, 4 RBI) and Tony Horton (4 for 5, 2 runs scored, 1 HR, 2 RBI) swung the big bats for the Indians.
Frank Robinson went 2 for 3 with 1 HR, 3 runs scored and 1 RBI and joined Brooks (2 for 5, 1 run, 3 RBI) and Boog (2 for 4, 1 run, 3 RBI) to pace the Bird's offense.