BAJFF Camrova Resources Inc (CE)

Before you invest, you may want to review the Fund’s prospectus, which contains more information about the Fund and its risks. You can find the Fund’s prospectus and other information about the Fund online at www.massmutual.com/funds. You can also get this information at no cost by calling 1-888-309-3539 or by sending an email request to fundinfo@massmutual.com.

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Example

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. It assumes that you invest $10,000 in each share class of the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. For Class A shares, the example includes the initial sales charge. The example also assumes that your investment earns a 5% return each year and that the Fund’s operating expenses are exactly as described in the preceding table. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 153% of the average value of its portfolio.

The Fund’s subadviser, Babson Capital Management LLC (“Babson Capital”), employs quantitative analysis to identify stocks included within the Index that it believes may have the potential to outperform the Index, using a proprietary model that ranks all stocks within the Index based on factors such as a company’s valuation, earnings quality, stock price momentum, and earnings improvement. Based on these rankings, Babson Capital seeks to construct a broadly diversified portfolio that it believes may have the potential to produce higher returns than the Index while maintaining risk characteristics similar to the Index. Babson Capital will typically adjust Index weights to: (1) overweight high-ranking stocks, (2) underweight low-ranking stocks (or not hold them at all), and (3) market weight stocks that do not have particularly high or low rankings. Babson Capital may also consider stocks not included in the Index but with similar market capitalizations. Babson Capital does not use market timing or macro economic forecasting in constructing the Fund’s portfolio.

The Fund expects that it will engage in active and frequent trading and so will typically have a relatively high portfolio turnover rate.

Frequent Trading/Portfolio Turnover Risk Portfolio turnover generally involves some expense to the Fund and may result in the realization of taxable capital gains (including short-term gains). The trading costs and tax effects associated with portfolio turnover may adversely affect the Fund’s performances.

Growth Company Risk The prices of growth securities are often more sensitive to market fluctuations because of their heavy dependence on future earnings expectations, and can be more volatile than the market in general.

Indexing Risk The Fund’s performance may not track the performance of the index exactly due to a number of factors, including fees and expenses of the Fund, and the Fund’s cash positions.

Liquidity Risk  Certain securities may be difficult (or impossible) to sell or positions difficult to close out at a desirable time and price, and the Fund may be required to hold an investment that is declining in value or be prevented from realizing capital gains.

Management Risk The Fund relies on the manager’s ability to achieve its investment objective. There can be no assurance that the Fund will achieve the desired results and the Fund may incur significant losses.

Market Risk The value of the Fund’s portfolio securities may decline, at times sharply and unpredictably, as a result of unfavorable market-induced changes affecting particular industries, sectors, or issuers. Stock market prices in general may decline over short or extended periods, subjecting the Fund to unpredictable declines in the value of its shares and poor performance. The Fund is subject to risks affecting issuers, such as management performance, financial leverage, industry problems, and reduced demand for goods or services.

Valuation Risk The Fund is subject to the risk of mispricing or improper valuation of its investments, in particular to the extent that its securities are fair valued.

bar chart shows changes in the Fund’s performance from year to year for Service Class shares. The table shows how the Fund’s average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance. Performance for Class R5, Administrative Class, and Class A shares of the Fund for periods prior to their inception date (11/01/04) is based on the performance of Service Class shares, adjusted for Administrative Class and Class A shares to reflect Administrative Class and Class A expenses, respectively, and for Class A shares to reflect any applicable sales charge. Performance for Class I, Class R4, and Class R3 shares of the Fund for periods prior to their inception date (04/01/14) is based on the performance of Class R5 shares, adjusted for Class R4 and Class R3 shares to reflect Class R4 and Class R3 expenses, respectively. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. More up-to-date performance information is available at http://www.massmutual.com/funds or by calling 1-888-309-3539 .

Portfolio Managers:

Chris C. Cao is a member of Babson Capital’s Quantitative Management Equity Team. He has managed the Fund since June 2001.

Michael F. Farrell is Head of Babson Capital’s Quantitative Equity Team. He has managed the Fund since its inception.

PURCHASE AND SALE OF FUND SHARES

Shares of the Fund are generally available to retirement plans, other institutional investors, and individual retirement accounts. Fund shares are redeemable on any business day by written request, telephone or internet (available to certain customers).

TAX INFORMATION

The Fund intends to make distributions that may be taxed as ordinary income or capital gains, unless you are an investor eligible for preferential tax treatment.

PAYMENTS TO BROKER-DEALERS AND OTHER FINANCIAL INTERMEDIARIES

If you purchase the Fund through a broker-dealer or other financial intermediary, the intermediary may receive a one-time or continuing payments from the Fund, MML Advisers or its affiliates, or others for the sale of Fund shares or continuing shareholder services provided by the intermediary. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary to recommend the Fund over another investment. You should contact your intermediary to obtain more information about the compensation it may receive in connection with your investment.