Only is said player is worthy to have his number retired. Santo yes...Billy Williams yes...Ernie Banks, Ryne Sandberg, yes. Maddux/Jenkins (no and yes), but Sosa doesn't, IMO deserve. I mean he only had six yrs out of 13 with the Cubs, that his numbers were considered "great" and those numbers between 1998 and 2003 are under suspicion. And the other 7 seasons with the Cubs, his numbers were VERY mediocre as a whole. http://www.baseball-reference.com/s/sosasa01.shtml So half his career with the Cubs he was pretty much average, the other half he was ABOVE-AVERAGE. When you put the full 13 yrs together, Sosa really isn't "number retiring" quality without serious debate. So, until the Cubs decide Sosa's number should or shouldn't be retired, his number should be made available to anybody who wants to wear, just like 31 was, and 8, and 17. NO EXCEPTIONS. The only numbers that are off-limits are the numbers worn by Santo/Williams and Banks with #31 being close to being off the market, so to speack. So, again, 21 should will be made available, and if Marquis wants to wear, he SHOULD be welcome to wearing it. Marquis wearing won't disrespect what Sosa did in the numbers. You're stretching it now. You're comparing entertainment that only affects us 8 months out of the yr, and not personally to that of current events that affect our day-to-day life and history? Nah...there is a different. People are dying to protect the freedoms that this country is founded on, and to compare that to players choosing to wear another player's numbers....is beyond stretching a point to fit into your argument. Again, if you need a number to remember the "greatness" of a player, then maybe the player wasn't so great after all, or you weren't paying attention to said players career. It is "just a number." Or should players pull a "Futurama" and start wearing fractions as numbers (ie 1/8....2/5)? So, again it is "just a number", and to make it out to be bigger then it supposed to be, is beyond nonsense.