Firstly, you've got some mad syntax and non-compliance going on there.
Second, a <TD
colspan="4"> will make that cell span 4 col(umn)s.
Similarly, a <TD
rowspan="2"> will make that row span 2 rows.
Code:
<html>
<body>
<TABLE BORDER="1" CELLPADDING="8" CELLSPACING="8" WIDTH="50%">
<TR>
<TH colspan="4">2007-2008 Season</TH>
</TR>
<TR>
<TD>Game Date</TD>
<TD>Kickoff</TD>
<TD>Opponent</TD>
<TD>Score</TD>
</TR>
<TR>
<TH colspan="4">Preseason</TH>
</TR>
<TR>
<TD>Fri 8/10/2007</TD>
<TD>7:30 P.M.</TD>
<TD>@ Buccaneers</TD>
<TD>13-10 L</TD>
</TR>
</TABLE>
</body>
</html>
What I've done there is nested the <TD>'s for easier readability.
Also note, <TD> and <TH> are essentially the same. <TH> (Table Header) bolds and centers the text inside. You could change these back to <TD>'s then apply your own formatting, if you want.