The answer to the former is Mike Brown (born 12/29/1959), who played mostly RF in 315 games from 1983 - 1988 for the Angels and Pirates.

The answer to the latter is indeed Julio Franco, who played for 8 different teams from 1982 – 2007, and played his final major league game on 9/17/2007, four years later than the next two players on that list. Rickey Henderson was actually third; Jesse Orosco, who played for 9 different teams from 1979 – 2003 (and is 20 months older than Rickey) was second, played his last MLB game on 9/27/2003. Rickey, who also played for 9 different teams from 1979 – 2003, played his final MLB game on 9/19/2003, eight days before Jesse’s final game.

A baseball fan’s life can be marked by three eras; the first is as a kid, when all Major Leaguers are older than you. The second is as an adult, when there are a mixture of players that are older and younger than you. And the final is as an “elder”, when all players older than you are already retired. Julio's retirement marked the end of the second era for me; as he was the last Major Leaguer older than me (b. 1959). That second era for me began on 6/11/1978, when Mike Morgan became the first player younger than me to play in the majors.

Incidentally, while researching this, I found it interesting that in 2004 and 2005 the two oldest players in the majors were unrelated Francos; Julio (b. 8/23/1958) and John (b. 9/17/1960).

I've also been intrigued by middle names and other interesting stuff such as hometowns.

There have only been four major leaguers from Donora, PA, but two of them have the same birthday (November 21). One's already in the Hall of Fame, and the other, a recent retiree, is believed to be a future inductee based on recent polling done here.

There have only been 11 major leaguers born on February 29, but they include two with the first name of Albert (Al Rosen and Al Autry), two with the middle name of Leonard (Pepper Martin, whose full name was Johnny Leonard Roosevelt Martin, and Rosen, who are also the two most successful big leaguers born on that day), and two with the last name of Long (the two most recent, Bill and Terrence, born in 1960 and 1976, respectively).

If anybody wants to look up their birthday, you can do it here:

http://www.baseball-reference.com/friv/birthdays.cgi

I'm not going to publish my birthdate...as an author here I need to be careful about how much personal information I post because if I post tiny bits many times, eventually I'll reveal my entire personal life here...heh. But I will say that I have a depressingly small talent pool born on my birthday--almost no players to reach even 1,000 games played in the big leagues.

PEDR0

Read it and marvel
I also own Picasso and John Anderson of YES which bought a lot of cred in high school

Sox flagged in Texas last two nights
Could imagine the fade starting now
What we really need is for Yankles and Rays to stop aying 700 ball

http://www.coolstandings.com/baseball_standings.asp?i=1

http://fenwaynation.blogspot.com/2010/07/sox-may-hire-bialystock.html

I remember as a kid doing the same. When I was finished memorizing the stats of a card I would look at middle names and birthdays. (Gooden and Strawberry both have Eugene for a middle name!?)
Things started getting weird (for me) as the DOB on some of the players started entering the 70's. I remember Upper-deck's A-rod card threw me for a loop when I saw his DOB... same year as me. It freaked me out and simultaneously was the final nail in my centerfield fantasy. Now, when I see guys born while I was in highschool, it makes me feel quite old. Even Kevin Youkilis, who looks 40, is 5 years younger than me.
As a boy, the players, regardless of their age, seemed timeless. Now as a man, the boys playing baseball, still feel timeless...

Side note:
last MLB player born in the 50's?
Rickey Henderson.