<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
this schedule contains summary financial information extracted from mason street
funds, inc. small cap. growth stock fund, 03/31/00 financial statements class a.
</LEGEND>
<CIK> 0001023744
<NAME> MASON STREET FUNDS, INC.
<SERIES>
<NUMBER> 061
<NAME> SMALL CAP. GROWTH STOCK FUND CLASS A
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> MAR-31-2000
<PERIOD-START> APR-01-1999
<PERIOD-END> MAR-31-2000
<INVESTMENTS-AT-COST> 9865489
<INVESTMENTS-AT-VALUE> 12470799
<RECEIVABLES> 151844
<ASSETS-OTHER> 409429
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 13032072
<PAYABLE-FOR-SECURITIES> 965495
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 40451
<TOTAL-LIABILITIES> 1005946
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 7426619
<SHARES-COMMON-STOCK> 576139
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1994197
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 2605310
<NET-ASSETS> 12026126
<DIVIDEND-INCOME> 4042
<INTEREST-INCOME> 22904
<OTHER-INCOME> 0
<EXPENSES-NET> 81872
<NET-INVESTMENT-INCOME> (54926)
<REALIZED-GAINS-CURRENT> 2287364
<APPREC-INCREASE-CURRENT> 2605310
<NET-CHANGE-FROM-OPS> 4837748
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 5156
<DISTRIBUTIONS-OF-GAINS> 233827
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 626286
<NUMBER-OF-SHARES-REDEEMED> 67331
<SHARES-REINVESTED> 16684
<NET-CHANGE-IN-ASSETS> 12016126
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 47936
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 190848
<AVERAGE-NET-ASSETS> 0
<PER-SHARE-NAV-BEGIN> 10.0
<PER-SHARE-NII> (0.08)
<PER-SHARE-GAIN-APPREC> 8.12
<PER-SHARE-DIVIDEND> 0.01
<PER-SHARE-DISTRIBUTIONS> 0.44
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 17.59
<EXPENSE-RATIO> 1.40
</TABLE>
