From about 2009 to 2011, posts on the blog had the URL structure blog.wikimedia.org/blog/(slug), which was later moved to blog.wikimedia.org/(slug) , with a 302 redirect pointing to the new URL (see e.g. [1]).
Since there are still quite a few (now broken) links to the old URLS (e.g. [2], [3]), it seems worthwhile to reinstate that redirect.
[1] https://web.archive.org/web/20130123202032/http://blog.wikimedia.org/blog/2009/10/27/wikimedia-finds-a-new-home/
[2] https://en.wikipedia.org/w/index.php?title=Special:LinkSearch&limit=500&offset=0&target=blog.wikimedia.org%2Fblog
[3] https://meta.wikimedia.org/w/index.php?title=Special:LinkSearch&limit=500&offset=0&target=blog.wikimedia.org%2Fblog