You can use this rule with B
flag in your /blog/.htaccess
file:
RewriteEngine On
RewriteBase /blog/
RewriteCond %{HTTP_HOST} ^(www\.)?example\.com$
RewriteRule ^2010/01/drying-glass-washing/doug@ 2010/01/drying-glass-washing/ [R=301,L,B,NC]
For rest of 2 URLs have these 2 rules in root .htaccess:
RewriteRule ^(product-name.php).+ /$1 [R=301,L,NC]
RewriteRule ^(career/)[^\w-] /$1 [R=301,L,NC]