When I was a kid collecting during the late 1980s and early 1990s, Roger Clemens rookie cards were always among the top of my want list.

It all started in elementary school when I read a short biography on Clemens in which his mother stated she knew he would be a big league star when he struck out three consecutive batters with nine pitches as a Little Leaguer.

And I'd later learn that's what's known as an "immaculate inning" in baseball.

But from that moment, I was in awe of his overpowering pitching ability...

His velocity, his splitter, and his tenacity on the mound were something to watch despite the controversy that surrounded him later in his career.

And this guide I take a look back at his rookie cards in detail one by one.

Let's get started!

Because of his unique style and offensive wizardry, Allen Iverson rookie cards are some of the most valuable basketball cards produced during the mid-90s.

And whether you love him or hate him, those offensive skills are exactly what made him so popular...

What he lacked in size he made up for with incredible quickness and his signature crossover move that was nearly impossible to defend.

Even during his college days at Georgetown, it was clear that he was going to be a big star in the NBA.

And the hype surrounding his transition to the NBA resulted in different manufacturers producing countless amounts of Iverson rookies.

Much like his playing style, many of his rookie cards are nothing less than flashy.

There are so many great designs on this list as you'll soon see...

Let's jump right in...

If there's one thing that quickly stands out about Nolan Ryan baseball cards it's this:

there are a ton of them to collect.

But, it's easy to understand why...

Ryan captivated the hearts of endless amounts of fans over with his incredible velocity and strikeout power.

And he did so over a career that spanned across four different decades.

Incredible popularity over a very long career will obviously result in countless amounts of baseball cards to collect...

However, there are some Ryan cards that standout more than others.

And in this guide we'll look at his best mainstream cards and some of my favorite oddball issues as well.

Let's jump right in!