<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
this schedule contains summary financial information extracted from mason street
funds, inc. growth and income stock fund, 09/30/00 financial statement class b.
</LEGEND>
<CIK> 0001023744
<NAME> MASON STREET FUNDS, INC.
<SERIES>
<NUMBER> 082
<NAME> GROWTH AND INCOME STOCK FUND CLASS B
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-2001
<PERIOD-START> APR-01-2000
<PERIOD-END> SEP-30-2000
<INVESTMENTS-AT-COST> 50,779,590
<INVESTMENTS-AT-VALUE> 54,411,081
<RECEIVABLES> 213,115
<ASSETS-OTHER> 48,849
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 54,673,045
<PAYABLE-FOR-SECURITIES> 31,011
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 284,001
<TOTAL-LIABILITIES> 315,012
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 49,658,273
<SHARES-COMMON-STOCK> 527,673
<SHARES-COMMON-PRIOR> 509,112
<ACCUMULATED-NII-CURRENT> 66,230
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1,002,039
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 3,631,491
<NET-ASSETS> 54,358,033
<DIVIDEND-INCOME> 305,589
<INTEREST-INCOME> 36,764
<OTHER-INCOME> 0
<EXPENSES-NET> (349,607)
<NET-INVESTMENT-INCOME> (7,254)
<REALIZED-GAINS-CURRENT> 936,366
<APPREC-INCREASE-CURRENT> (3,953,191)
<NET-CHANGE-FROM-OPS> (3,024,079)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 60,399
<NUMBER-OF-SHARES-REDEEMED> 41,838
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> (3,390,556)
<ACCUMULATED-NII-PRIOR> 73,487
<ACCUMULATED-GAINS-PRIOR> 63,729
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 179,894
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 408,921
<AVERAGE-NET-ASSETS> 6,048,022
<PER-SHARE-NAV-BEGIN> 12.25
<PER-SHARE-NII> (0.03)
<PER-SHARE-GAIN-APPREC> (0.65)
<PER-SHARE-DIVIDEND> 0.00
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 11.57
<EXPENSE-RATIO> 1.85
</TABLE>
