Albert Pujols didn't need the entire decade to make this list

300 HR, 1000 RBI: 1900's-1980's

20's: Babe Ruth

30's Jimmie Foxx

30's Lou Gehrig

30's Mel Ott

50's Duke Snider

50's Gil Hodges

60's Harmon Killebrew

60's Hank Aaron

60's Willie Mays

60's Frank Robinson

1990's: Ken Griffey Jr., Albert Belle, Juan Gonzalez, Barry Bonds, Frank Thomas, Rafael Palmeiro

2000's: Manny Ramirez, Albert Pujols, Alex Rodriguez, David Ortiz, Lance Berkman, Carlos Delgado, Vladimir Guerrero (Jim Thome is 14 RBI short and Carlos Lee 9 HR, so it is unlikely to grow)

The only teammates for an entire decade on the list are Duke Snider and Gil Hodges, who both played for the Brooklyn/LA Dodgers in the 1950's.

Other teammates:

Albert Belle and Frank Thomas; 1997-1998; Chicago White Sox

Juan Gonzalez and Rafael Palmeiro; 1990-1993, 1999; Texas Rangers

Manny Ramirez and David Ortiz; 2003-2008; Boston Red Sox

Did not play in every season of the decade:

Albert Pujols (2001-present)