<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
this schedule contains summary financial information extracted from mason street
funds, inc. high yield bond fund, 09/30/00 financial statement class a.
</LEGEND>
<CIK> 0001023744
<NAME> MASON STREET FUNDS, INC.
<SERIES>
<NUMBER> 061
<NAME> HIGH YIELD BOND FUND CLASS A
<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> 42,479,749
<INVESTMENTS-AT-VALUE> 40,474,251
<RECEIVABLES> 1,813,046
<ASSETS-OTHER> 254,938
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 42,542,235
<PAYABLE-FOR-SECURITIES> 1,154,849
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 492,236
<TOTAL-LIABILITIES> 1,647,085
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 51,973,572
<SHARES-COMMON-STOCK> 4,706,534
<SHARES-COMMON-PRIOR> 4,371,667
<ACCUMULATED-NII-CURRENT> 65,215
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (9,138,139)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (2,005,498)
<NET-ASSETS> 40,895,150
<DIVIDEND-INCOME> 173,901
<INTEREST-INCOME> 2,092,261
<OTHER-INCOME> 0
<EXPENSES-NET> (275,105)
<NET-INVESTMENT-INCOME> 1,991,057
<REALIZED-GAINS-CURRENT> (1,568,058)
<APPREC-INCREASE-CURRENT> 561,622
<NET-CHANGE-FROM-OPS> 984,621
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (1,777,361)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 180,033
<NUMBER-OF-SHARES-REDEEMED> 63,752
<SHARES-REINVESTED> 218,586
<NET-CHANGE-IN-ASSETS> 1,576,227
<ACCUMULATED-NII-PRIOR> 65,113
<ACCUMULATED-GAINS-PRIOR> (7,569,886)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 150,969
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 335,858
<AVERAGE-NET-ASSETS> 35,386,724
<PER-SHARE-NAV-BEGIN> 7.94
<PER-SHARE-NII> 0.38
<PER-SHARE-GAIN-APPREC> (0.19)
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (0.39)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 7.74
<EXPENSE-RATIO> 1.30
</TABLE>
