I have mixed feelings about the second wild card. But: Per SABR, here are what would have been the second wild card teams for the last 10 years.
2002
NL Wild card: San Francisco, 95-66 (lost WS). 2nd wild card: Los Angeles, 92-70.
AL Wild card: Anaheim, 99-63 (won WS). 2nd wild card: Boston, Seattle, both 93-69.
2003
NL Wild card: Florida, 91-71 (won WS). 2nd wild card: Houston, 87-75.
AL Wild card: Boston, 95-67. 2nd wild card: Seattle 93-69.
2004
NL Wild card: Houston, 92-70. 2nd wild card: San Francisco, 91-71.
AL Wild card: Boston, 98-64 (won WS). 2nd wild card: Oakland, 91-71.
2005
NL Wild card: Houston, 89-73 (lost WS). 2nd wild card: Philadelphia, 88-74.
AL Wild card: Boston, 95-67. 2nd wild card: Cleveland, 93-69.
2006
NL Wild card: Los Angeles, 88-74. 2nd wild card: Philadelphia, 85-77.
AL Wild card: Detroit, 95-67 (lost WS). 2nd wild card: Chicago, 90-72.
2007
NL Wild card: Colorado, 90-73 (lost WS). 2nd wild card: San Diego, 89-74.
AL Wild card: New York, 94-68. 2nd wild card: Detroit or Seattle (both 88-74)
2008
NL Wild card: Milwaukee, 90-72. 2nd wild card: New York, 89-73.
AL Wild card: Boston, 95-67. 2nd wild card: New York, 89-73. (Note: White Sox and Twins had one-game playoff to decide divisional title. Twins held season-series edge on White Sox, and both teams had same end-of-season record as second wild card Yankees. How would MLB have decided that?)
2009
NL Wild card: Colorado, 92-70. 2nd wild card: San Francisco, 88-74.
AL Wild card: Boston, 95-67. 2nd wild card: Texas, 87-75.
2010
NL Wild card: Atlanta, 91-71. 2nd wild card: San Diego, 90-72.
AL Wild card: New York, 95-67. 2nd wild card: Boston, 89-73.
2011
NL Wild card: St. Louis, 90-72 (won WS). 2nd wild card: Atlanta, 89-73.
AL Wild card: Tampa Bay, 91-71. 2nd wild card: Boston, 90-72. (Note: Under new rules, Atlanta, St. Louis, Boston and Tampa Bay all would have become wild cards, nullifying final-day excitement of 2011 regular season.)
Note that there are no basemen dwellers here, and the record of the second wild-card is usually pretty close to the first, and no worse than 85 wins.