That's difficult. If there are only a few entries, I would do it manually, but if there are tons you have no choice but to create a script to handle it.
First, on the server to which the database is being sent, create a script to add new rows to your table based on the input you submit. For example:
<?php
$date = $_REQUEST['date'];
$text = $_REQUEST['text'];
$title = $_REQUEST['title'];
$author = "Insert Your Name";
$date = "?" //Convert From Old Format
$gmt = "?" //Convert Time To GMT Here
$category = "Insert Category #";
//Code to Access MySQL Database Goes Here
mysql_query("INSERT INTO wp_posts VALUES ( NULL, '" . $author . "', '" . $date . "', '", "' . $gmt . "', '" . $text . "', '" . $title . "', '" . $category . "')");
?>
And on the originating server, insert the following code:
<?php
//Code to Access MySQL Database Goes Here
$result = mysql_query("SELECT * FROM footballtbl");
while ($row = mysql_fetch_assoc($result)) {
$date = $row['date'];
$text = $row['text'];
$title = $row['title'];
$nothing = file("http://yournewsite.com/scriptname.php?date=" . $date . "&text=" . $text . "&title=" . $title);
}
?>
Please carefully look over the code and back up your database before you run it.